ICollection<T> Interface
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Defines methods to manipulate generic collections.
generic <typename T>
public interface class ICollection : System::Collections::Generic::IEnumerable<T>
public interface ICollection<T> : System.Collections.Generic.IEnumerable<T>
type ICollection<'T> = interface
interface seq<'T>
interface IEnumerable
Public Interface ICollection(Of T)
Implements IEnumerable(Of T)
Type Parameters
- T
The type of the elements in the collection.
- Derived
- Implements
Examples
The following example implements the ICollection<T> interface to create a collection of custom Box
objects named BoxCollection
. Each Box
has height, length, and width properties, which are used to define equality. Equality can be defined as all dimensions being the same or the volume being the same. The Box
class implements the IEquatable<T> interface to define the default equality as the dimensions being the same.
The BoxCollection
class implements the Contains method to use the default equality to determine whether a Box
is in the collection. This method is used by the Add method so that each Box
added to the collection has a unique set of dimensions. The BoxCollection
class also provides an overload of the Contains method that takes a specified EqualityComparer<T> object, such as BoxSameDimensions
and BoxSameVol
classes in the example.
This example also implements an IEnumerator<T> interface for the BoxCollection
class so that the collection can be enumerated.
using System;
using System.Collections;
using System.Collections.Generic;
class Program
{
static void Main(string[] args)
{
BoxCollection bxList = new BoxCollection();
bxList.Add(new Box(10, 4, 6));
bxList.Add(new Box(4, 6, 10));
bxList.Add(new Box(6, 10, 4));
bxList.Add(new Box(12, 8, 10));
// Same dimensions. Cannot be added:
bxList.Add(new Box(10, 4, 6));
// Test the Remove method.
Display(bxList);
Console.WriteLine("Removing 6x10x4");
bxList.Remove(new Box(6, 10, 4));
Display(bxList);
// Test the Contains method.
Box BoxCheck = new Box(8, 12, 10);
Console.WriteLine("Contains {0}x{1}x{2} by dimensions: {3}",
BoxCheck.Height.ToString(), BoxCheck.Length.ToString(),
BoxCheck.Width.ToString(), bxList.Contains(BoxCheck).ToString());
// Test the Contains method overload with a specified equality comparer.
Console.WriteLine("Contains {0}x{1}x{2} by volume: {3}",
BoxCheck.Height.ToString(), BoxCheck.Length.ToString(),
BoxCheck.Width.ToString(), bxList.Contains(BoxCheck,
new BoxSameVol()).ToString());
}
public static void Display(BoxCollection bxList)
{
Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
foreach (Box bx in bxList)
{
Console.WriteLine("{0}\t{1}\t{2}\t{3}",
bx.Height.ToString(), bx.Length.ToString(),
bx.Width.ToString(), bx.GetHashCode().ToString());
}
// Results by manipulating the enumerator directly:
//IEnumerator enumerator = bxList.GetEnumerator();
//Console.WriteLine("\nHeight\tLength\tWidth\tHash Code");
//while (enumerator.MoveNext())
//{
// Box b = (Box)enumerator.Current;
// Console.WriteLine("{0}\t{1}\t{2}\t{3}",
// b.Height.ToString(), b.Length.ToString(),
// b.Width.ToString(), b.GetHashCode().ToString());
//}
Console.WriteLine();
}
}
public class Box : IEquatable<Box>
{
public Box(int h, int l, int w)
{
this.Height = h;
this.Length = l;
this.Width = w;
}
public int Height { get; set; }
public int Length { get; set; }
public int Width { get; set; }
// Defines equality using the
// BoxSameDimensions equality comparer.
public bool Equals(Box other)
{
if (new BoxSameDimensions().Equals(this, other))
{
return true;
}
else
{
return false;
}
}
public override bool Equals(object obj)
{
return base.Equals(obj);
}
public override int GetHashCode()
{
return base.GetHashCode();
}
}
public class BoxCollection : ICollection<Box>
{
// The generic enumerator obtained from IEnumerator<Box>
// by GetEnumerator can also be used with the non-generic IEnumerator.
// To avoid a naming conflict, the non-generic IEnumerable method
// is explicitly implemented.
public IEnumerator<Box> GetEnumerator()
{
return new BoxEnumerator(this);
}
IEnumerator IEnumerable.GetEnumerator()
{
return new BoxEnumerator(this);
}
// The inner collection to store objects.
private List<Box> innerCol;
public BoxCollection()
{
innerCol = new List<Box>();
}
// Adds an index to the collection.
public Box this[int index]
{
get { return (Box)innerCol[index]; }
set { innerCol[index] = value; }
}
// Determines if an item is in the collection
// by using the BoxSameDimensions equality comparer.
public bool Contains(Box item)
{
bool found = false;
foreach (Box bx in innerCol)
{
// Equality defined by the Box
// class's implmentation of IEquatable<T>.
if (bx.Equals(item))
{
found = true;
}
}
return found;
}
// Determines if an item is in the
// collection by using a specified equality comparer.
public bool Contains(Box item, EqualityComparer<Box> comp)
{
bool found = false;
foreach (Box bx in innerCol)
{
if (comp.Equals(bx, item))
{
found = true;
}
}
return found;
}
// Adds an item if it is not already in the collection
// as determined by calling the Contains method.
public void Add(Box item)
{
if (!Contains(item))
{
innerCol.Add(item);
}
else
{
Console.WriteLine("A box with {0}x{1}x{2} dimensions was already added to the collection.",
item.Height.ToString(), item.Length.ToString(), item.Width.ToString());
}
}
public void Clear()
{
innerCol.Clear();
}
public void CopyTo(Box[] array, int arrayIndex)
{
if (array == null)
throw new ArgumentNullException("The array cannot be null.");
if (arrayIndex < 0)
throw new ArgumentOutOfRangeException("The starting array index cannot be negative.");
if (Count > array.Length - arrayIndex)
throw new ArgumentException("The destination array has fewer elements than the collection.");
for (int i = 0; i < innerCol.Count; i++) {
array[i + arrayIndex] = innerCol[i];
}
}
public int Count
{
get
{
return innerCol.Count;
}
}
public bool IsReadOnly
{
get { return false; }
}
public bool Remove(Box item)
{
bool result = false;
// Iterate the inner collection to
// find the box to be removed.
for (int i = 0; i < innerCol.Count; i++)
{
Box curBox = (Box)innerCol[i];
if (new BoxSameDimensions().Equals(curBox, item))
{
innerCol.RemoveAt(i);
result = true;
break;
}
}
return result;
}
}
// Defines the enumerator for the Boxes collection.
// (Some prefer this class nested in the collection class.)
public class BoxEnumerator : IEnumerator<Box>
{
private BoxCollection _collection;
private int curIndex;
private Box curBox;
public BoxEnumerator(BoxCollection collection)
{
_collection = collection;
curIndex = -1;
curBox = default(Box);
}
public bool MoveNext()
{
//Avoids going beyond the end of the collection.
if (++curIndex >= _collection.Count)
{
return false;
}
else
{
// Set current box to next item in collection.
curBox = _collection[curIndex];
}
return true;
}
public void Reset() { curIndex = -1; }
void IDisposable.Dispose() { }
public Box Current
{
get { return curBox; }
}
object IEnumerator.Current
{
get { return Current; }
}
}
// Defines two boxes as equal if they have the same dimensions.
public class BoxSameDimensions : EqualityComparer<Box>
{
public override bool Equals(Box b1, Box b2)
{
if (b1.Height == b2.Height && b1.Length == b2.Length
&& b1.Width == b2.Width)
{
return true;
}
else
{
return false;
}
}
public override int GetHashCode(Box bx)
{
int hCode = bx.Height ^ bx.Length ^ bx.Width;
return hCode.GetHashCode();
}
}
// Defines two boxes as equal if they have the same volume.
public class BoxSameVol : EqualityComparer<Box>
{
public override bool Equals(Box b1, Box b2)
{
if ((b1.Height * b1.Length * b1.Width) ==
(b2.Height * b2.Length * b2.Width))
{
return true;
}
else
{
return false;
}
}
public override int GetHashCode(Box bx)
{
int hCode = bx.Height ^ bx.Length ^ bx.Width;
Console.WriteLine("HC: {0}", hCode.GetHashCode());
return hCode.GetHashCode();
}
}
/*
This code example displays the following output:
================================================
A box with 10x4x6 dimensions was already added to the collection.
Height Length Width Hash Code
10 4 6 46104728
4 6 10 12289376
6 10 4 43495525
12 8 10 55915408
Removing 6x10x4
Height Length Width Hash Code
10 4 6 46104728
4 6 10 12289376
12 8 10 55915408
Contains 8x12x10 by dimensions: False
Contains 8x12x10 by volume: True
*/
Imports System.Collections
Imports System.Collections.Generic
Class Program
Public Shared Sub Main(ByVal args() As String)
Dim bxList As BoxCollection = New BoxCollection()
bxList.Add(New Box(10, 4, 6))
bxList.Add(New Box(4, 6, 10))
bxList.Add(New Box(6, 10, 4))
bxList.Add(New Box(12, 8, 10))
' Same dimensions. Cannot be added:
bxList.Add(New Box(10, 4, 6))
' Test the Remove method.
Display(bxList)
Console.WriteLine("Removing 6x10x4")
bxList.Remove(New Box(6, 10, 4))
Display(bxList)
' Test the Contains method
Dim BoxCheck As Box = New Box(8, 12, 10)
Console.WriteLine("Contains {0}x{1}x{2} by dimensions: {3}", BoxCheck.Height.ToString(),
BoxCheck.Length.ToString(), BoxCheck.Width.ToString(), bxList.Contains(BoxCheck).ToString())
' Test the Contains method overload with a specified equality comparer.
Console.WriteLine("Contains {0}x{1}x{2} by volume: {3}", BoxCheck.Height.ToString(),
BoxCheck.Length.ToString(), BoxCheck.Width.ToString(),
bxList.Contains(BoxCheck, New BoxSameVol()).ToString())
End Sub
Public Shared Sub Display(ByVal bxList As BoxCollection)
Console.WriteLine(vbLf & "Height" & vbTab & "Length" & vbTab & "Width" & vbTab & "Hash Code")
For Each bx As Box In bxList
Console.WriteLine("{0}" & vbTab & "{1}" & vbTab & "{2}" & vbTab & "{3}", bx.Height.ToString(), bx.Length.ToString(), bx.Width.ToString(), bx.GetHashCode().ToString())
Next
Console.WriteLine()
End Sub
End Class
Public Class Box : Implements IEquatable(Of Box)
Public Sub New(ByVal h As Integer, ByVal l As Integer, ByVal w As Integer)
Me.Height = h
Me.Length = l
Me.Width = w
End Sub
Private _Height As Integer
Public Property Height() As Integer
Get
Return _Height
End Get
Set(ByVal value As Integer)
_Height = value
End Set
End Property
Private _Length As Integer
Public Property Length() As Integer
Get
Return _Length
End Get
Set(ByVal value As Integer)
_Length = value
End Set
End Property
Private _Width As Integer
Public Property Width() As Integer
Get
Return _Width
End Get
Set(ByVal value As Integer)
_Width = value
End Set
End Property
Public Overloads Function Equals(ByVal other As Box) As Boolean Implements IEquatable(Of Box).Equals
Dim BoxSameDim = New BoxSameDimensions()
If BoxSameDim.Equals(Me, other) Then
Return True
Else
Return False
End If
End Function
Public Overrides Function Equals(ByVal obj As Object) As Boolean
Return MyBase.Equals(obj)
End Function
Public Overrides Function GetHashCode() As Integer
Return MyBase.GetHashCode()
End Function
End Class
Public Class BoxCollection : Implements ICollection(Of Box)
' The generic enumerator obtained from IEnumerator<Box> by GetEnumerator can also
' be used with the non-generic IEnumerator. To avoid a naming conflict,
' the non-generic IEnumerable method is explicitly implemented.
Public Function GetEnumerator() As IEnumerator(Of Box) _
Implements IEnumerable(Of Box).GetEnumerator
Return New BoxEnumerator(Me)
End Function
Private Function GetEnumerator1() As IEnumerator _
Implements IEnumerable.GetEnumerator
Return Me.GetEnumerator()
End Function
' The inner collection to store objects.
Private innerCol As List(Of Box)
Public Sub New()
innerCol = New List(Of Box)
End Sub
' Adds an index to the collection.
Default Public Property Item(ByVal index As Integer) As Box
Get
'If index <> -1 Then
Return CType(innerCol(index), Box)
'End If
'Return Nothing
End Get
Set(ByVal Value As Box)
innerCol(index) = Value
End Set
End Property
' Determines if an item is in the collection
' by using the BoxSameDimensions equality comparer.
Public Function Contains(ByVal item As Box) As Boolean _
Implements ICollection(Of Box).Contains
Dim found As Boolean = False
Dim bx As Box
For Each bx In innerCol
If New BoxSameDimensions().Equals(bx, item) Then
found = True
End If
Next
Return found
End Function
' Determines if an item is in the
' collection by using a specified equality comparer.
Public Function Contains(ByVal item As Box, _
ByVal comp As EqualityComparer(Of Box)) As Boolean
Dim found As Boolean = False
Dim bx As Box
For Each bx In innerCol
If comp.Equals(bx, item) Then
found = True
End If
Next
Return found
End Function
' Adds an item if it is not already in the collection
' as determined by calling the Contains method.
Public Sub Add(ByVal item As Box) _
Implements ICollection(Of Box).Add
If Not Me.Contains(item) Then
innerCol.Add(item)
Else
Console.WriteLine("A box with {0}x{1}x{2} dimensions was already added to the collection.",
item.Height.ToString(), item.Length.ToString(), item.Width.ToString())
End If
End Sub
Public Sub Clear() Implements ICollection(Of Box).Clear
innerCol.Clear()
End Sub
Public Sub CopyTo(array As Box(), arrayIndex As Integer) _
Implements ICollection(Of Box).CopyTo
If array Is Nothing Then
Throw New ArgumentNullException("The array cannot be null.")
Else If arrayIndex < 0 Then
Throw New ArgumentOutOfRangeException("The starting array index cannot be negative.")
Else If Count > array.Length - arrayIndex + 1 Then
Throw New ArgumentException("The destination array has fewer elements than the collection.")
End If
For i As Integer = 0 To innerCol.Count - 1
array(i + arrayIndex) = innerCol(i)
Next
End Sub
Public ReadOnly Property Count() As Integer _
Implements ICollection(Of Box).Count
Get
Return innerCol.Count
End Get
End Property
Public ReadOnly Property IsReadOnly() As Boolean _
Implements ICollection(Of Box).IsReadOnly
Get
Return False
End Get
End Property
Public Function Remove(ByVal item As Box) As Boolean _
Implements ICollection(Of Box).Remove
Dim result As Boolean = False
' Iterate the inner collection to
' find the box to be removed.
Dim i As Integer
For i = 0 To innerCol.Count - 1
Dim curBox As Box = CType(innerCol(i), Box)
If New BoxSameDimensions().Equals(curBox, item) Then
innerCol.RemoveAt(i)
result = True
Exit For
End If
Next
Return result
End Function
End Class
' Defines the enumerator for the Boxes collection.
' (Some prefer this class nested in the collection class.)
Public Class BoxEnumerator
Implements IEnumerator(Of Box)
Private _collection As BoxCollection
Private curIndex As Integer
Private curBox As Box
Public Sub New(ByVal collection As BoxCollection)
MyBase.New()
_collection = collection
curIndex = -1
curBox = Nothing
End Sub
Private Property Box As Box
Public Function MoveNext() As Boolean _
Implements IEnumerator(Of Box).MoveNext
curIndex = curIndex + 1
If curIndex = _collection.Count Then
' Avoids going beyond the end of the collection.
Return False
Else
'Set current box to next item in collection.
curBox = _collection(curIndex)
End If
Return True
End Function
Public Sub Reset() _
Implements IEnumerator(Of Box).Reset
curIndex = -1
End Sub
Public Sub Dispose() _
Implements IEnumerator(Of Box).Dispose
End Sub
Public ReadOnly Property Current() As Box _
Implements IEnumerator(Of Box).Current
Get
If curBox Is Nothing Then
Throw New InvalidOperationException()
End If
Return curBox
End Get
End Property
Private ReadOnly Property Current1() As Object _
Implements IEnumerator.Current
Get
Return Me.Current
End Get
End Property
End Class
' Defines two boxes as equal if they have the same dimensions.
Public Class BoxSameDimensions
Inherits EqualityComparer(Of Box)
Public Overrides Function Equals(ByVal b1 As Box, ByVal b2 As Box) As Boolean
If b1.Height = b2.Height And b1.Length = b2.Length And b1.Width = b2.Width Then
Return True
Else
Return False
End If
End Function
Public Overrides Function GetHashCode(ByVal bx As Box) As Integer
Dim hCode As Integer = bx.Height ^ bx.Length ^ bx.Width
Return hCode.GetHashCode()
End Function
End Class
' Defines two boxes as equal if they have the same volume.
Public Class BoxSameVol
Inherits EqualityComparer(Of Box)
Public Overrides Function Equals(ByVal b1 As Box, ByVal b2 As Box) As Boolean
If (b1.Height * b1.Length * b1.Width) _
= (b2.Height * b2.Length * b2.Width) Then
Return True
Else
Return False
End If
End Function
Public Overrides Function GetHashCode(ByVal bx As Box) As Integer
Dim hCode As Integer = bx.Height ^ bx.Length ^ bx.Width
Console.WriteLine("HC: {0}", hCode.GetHashCode())
Return hCode.GetHashCode()
End Function
End Class
' This code example displays the following output:
' ================================================
'
' A box with 10x4x6 dimensions was already added to the collection.
'
' Height Length Width Hash Code
' 10 4 6 46104728
' 4 6 10 12289376
' 6 10 4 43495525
' 12 8 10 55915408
'
' Removing 6x10x4
'
' Height Length Width Hash Code
' 10 4 6 46104728
' 4 6 10 12289376
' 12 8 10 55915408
'
' Contains 8x12x10 by dimensions: False
' Contains 8x12x10 by volume: True
'
Remarks
The ICollection<T> interface is the base interface for classes in the System.Collections.Generic namespace.
The ICollection<T> interface extends IEnumerable<T>; IDictionary<TKey,TValue> and IList<T> are more specialized interfaces that extend ICollection<T>. A IDictionary<TKey,TValue> implementation is a collection of key/value pairs, like the Dictionary<TKey,TValue> class. A IList<T> implementation is a collection of values, and its members can be accessed by index, like the List<T> class.
If neither the IDictionary<TKey,TValue> interface nor the IList<T> interface meet the requirements of the required collection, derive the new collection class from the ICollection<T> interface instead for more flexibility.
Properties
Count |
Gets the number of elements contained in the ICollection<T>. |
IsReadOnly |
Gets a value indicating whether the ICollection<T> is read-only. |
Methods
Add(T) |
Adds an item to the ICollection<T>. |
Clear() |
Removes all items from the ICollection<T>. |
Contains(T) |
Determines whether the ICollection<T> contains a specific value. |
CopyTo(T[], Int32) |
Copies the elements of the ICollection<T> to an Array, starting at a particular Array index. |
GetEnumerator() |
Returns an enumerator that iterates through a collection. (Inherited from IEnumerable) |
Remove(T) |
Removes the first occurrence of a specific object from the ICollection<T>. |
Extension Methods
ToFrozenDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a FrozenDictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector function. |
ToFrozenDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a FrozenDictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions. |
ToFrozenSet<T>(IEnumerable<T>, IEqualityComparer<T>) |
Creates a FrozenSet<T> with the specified values. |
ToImmutableArray<TSource>(IEnumerable<TSource>) |
Creates an immutable array from the specified collection. |
ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Constructs an immutable dictionary from an existing collection of elements, applying a transformation function to the source keys. |
ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Constructs an immutable dictionary based on some transformation of a sequence. |
ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents. |
ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key comparer. |
ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>, IEqualityComparer<TValue>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key and value comparers. |
ToImmutableHashSet<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable hash set of its contents. |
ToImmutableHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Enumerates a sequence, produces an immutable hash set of its contents, and uses the specified equality comparer for the set type. |
ToImmutableList<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable list of its contents. |
ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents. |
ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key comparer. |
ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>, IEqualityComparer<TValue>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key and value comparers. |
ToImmutableSortedSet<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable sorted set of its contents. |
ToImmutableSortedSet<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Enumerates a sequence, produces an immutable sorted set of its contents, and uses the specified comparer. |
CopyToDataTable<T>(IEnumerable<T>) |
Returns a DataTable that contains copies of the DataRow objects, given an input IEnumerable<T> object where the generic parameter |
CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption) |
Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter |
CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption, FillErrorEventHandler) |
Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter |
Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) |
Applies an accumulator function over a sequence. |
Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>) |
Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. |
Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>) |
Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. |
AggregateBy<TSource,TKey,TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, IEqualityComparer<TKey>) | |
AggregateBy<TSource,TKey,TAccumulate>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TKey,TAccumulate>, Func<TAccumulate,TSource,TAccumulate>, IEqualityComparer<TKey>) | |
All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether all elements of a sequence satisfy a condition. |
Any<TSource>(IEnumerable<TSource>) |
Determines whether a sequence contains any elements. |
Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether any element of a sequence satisfies a condition. |
Append<TSource>(IEnumerable<TSource>, TSource) |
Appends a value to the end of the sequence. |
AsEnumerable<TSource>(IEnumerable<TSource>) |
Returns the input typed as IEnumerable<T>. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. |
Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. |
Cast<TResult>(IEnumerable) |
Casts the elements of an IEnumerable to the specified type. |
Chunk<TSource>(IEnumerable<TSource>, Int32) |
Splits the elements of a sequence into chunks of size at most |
Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Concatenates two sequences. |
Contains<TSource>(IEnumerable<TSource>, TSource) |
Determines whether a sequence contains a specified element by using the default equality comparer. |
Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) |
Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>. |
Count<TSource>(IEnumerable<TSource>) |
Returns the number of elements in a sequence. |
Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns a number that represents how many elements in the specified sequence satisfy a condition. |
CountBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) | |
DefaultIfEmpty<TSource>(IEnumerable<TSource>) |
Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty. |
DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) |
Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. |
Distinct<TSource>(IEnumerable<TSource>) |
Returns distinct elements from a sequence by using the default equality comparer to compare values. |
Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values. |
DistinctBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns distinct elements from a sequence according to a specified key selector function. |
DistinctBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Returns distinct elements from a sequence according to a specified key selector function and using a specified comparer to compare keys. |
ElementAt<TSource>(IEnumerable<TSource>, Index) |
Returns the element at a specified index in a sequence. |
ElementAt<TSource>(IEnumerable<TSource>, Int32) |
Returns the element at a specified index in a sequence. |
ElementAtOrDefault<TSource>(IEnumerable<TSource>, Index) |
Returns the element at a specified index in a sequence or a default value if the index is out of range. |
ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32) |
Returns the element at a specified index in a sequence or a default value if the index is out of range. |
Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set difference of two sequences by using the default equality comparer to compare values. |
Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values. |
ExceptBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>) |
Produces the set difference of two sequences according to a specified key selector function. |
ExceptBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set difference of two sequences according to a specified key selector function. |
First<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence. |
First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the first element in a sequence that satisfies a specified condition. |
FirstOrDefault<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence, or a default value if the sequence contains no elements. |
FirstOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the first element of a sequence, or a specified default value if the sequence contains no elements. |
FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. |
FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the first element of the sequence that satisfies a condition, or a specified default value if no such element is found. |
GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Groups the elements of a sequence according to a specified key selector function. |
GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer. |
GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. |
GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. |
GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. |
GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer. |
GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function. |
GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>, TResult>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. |
GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>, TResult>) |
Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. |
GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>, TResult>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer<T> is used to compare keys. |
Index<TSource>(IEnumerable<TSource>) |
Returns an enumerable that incorporates the element's index into a tuple. |
Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set intersection of two sequences by using the default equality comparer to compare values. |
Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values. |
IntersectBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>) |
Produces the set intersection of two sequences according to a specified key selector function. |
IntersectBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TKey>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set intersection of two sequences according to a specified key selector function. |
Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>) |
Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys. |
Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on matching keys. A specified IEqualityComparer<T> is used to compare keys. |
Last<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence. |
Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the last element of a sequence that satisfies a specified condition. |
LastOrDefault<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence, or a default value if the sequence contains no elements. |
LastOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the last element of a sequence, or a specified default value if the sequence contains no elements. |
LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. |
LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the last element of a sequence that satisfies a condition, or a specified default value if no such element is found. |
LongCount<TSource>(IEnumerable<TSource>) |
Returns an Int64 that represents the total number of elements in a sequence. |
LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns an Int64 that represents how many elements in a sequence satisfy a condition. |
Max<TSource>(IEnumerable<TSource>) |
Returns the maximum value in a generic sequence. |
Max<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Returns the maximum value in a generic sequence. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the maximum Decimal value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the maximum Double value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the maximum Int32 value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the maximum Int64 value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. |
Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the maximum Single value. |
Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. |
MaxBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns the maximum value in a generic sequence according to a specified key selector function. |
MaxBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Returns the maximum value in a generic sequence according to a specified key selector function and key comparer. |
Min<TSource>(IEnumerable<TSource>) |
Returns the minimum value in a generic sequence. |
Min<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Returns the minimum value in a generic sequence. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the minimum Decimal value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the minimum Double value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the minimum Int32 value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the minimum Int64 value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. |
Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the minimum Single value. |
Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. |
MinBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Returns the minimum value in a generic sequence according to a specified key selector function. |
MinBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Returns the minimum value in a generic sequence according to a specified key selector function and key comparer. |
OfType<TResult>(IEnumerable) |
Filters the elements of an IEnumerable based on a specified type. |
Order<T>(IEnumerable<T>) |
Sorts the elements of a sequence in ascending order. |
Order<T>(IEnumerable<T>, IComparer<T>) |
Sorts the elements of a sequence in ascending order. |
OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in ascending order according to a key. |
OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in ascending order by using a specified comparer. |
OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in descending order according to a key. |
OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in descending order by using a specified comparer. |
OrderDescending<T>(IEnumerable<T>) |
Sorts the elements of a sequence in descending order. |
OrderDescending<T>(IEnumerable<T>, IComparer<T>) |
Sorts the elements of a sequence in descending order. |
Prepend<TSource>(IEnumerable<TSource>, TSource) |
Adds a value to the beginning of the sequence. |
Reverse<TSource>(IEnumerable<TSource>) |
Inverts the order of the elements in a sequence. |
Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Projects each element of a sequence into a new form. |
Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) |
Projects each element of a sequence into a new form by incorporating the element's index. |
SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>) |
Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence. |
SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>) |
Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element. |
SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) |
Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. |
SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) |
Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element. |
SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. |
SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>. |
Single<TSource>(IEnumerable<TSource>) |
Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence. |
Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists. |
SingleOrDefault<TSource>(IEnumerable<TSource>) |
Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
SingleOrDefault<TSource>(IEnumerable<TSource>, TSource) |
Returns the only element of a sequence, or a specified default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>, TSource) |
Returns the only element of a sequence that satisfies a specified condition, or a specified default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
Skip<TSource>(IEnumerable<TSource>, Int32) |
Bypasses a specified number of elements in a sequence and then returns the remaining elements. |
SkipLast<TSource>(IEnumerable<TSource>, Int32) |
Returns a new enumerable collection that contains the elements from |
SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. |
SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. |
Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. |
Take<TSource>(IEnumerable<TSource>, Int32) |
Returns a specified number of contiguous elements from the start of a sequence. |
Take<TSource>(IEnumerable<TSource>, Range) |
Returns a specified range of contiguous elements from a sequence. |
TakeLast<TSource>(IEnumerable<TSource>, Int32) |
Returns a new enumerable collection that contains the last |
TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns elements from a sequence as long as a specified condition is true. |
TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function. |
ToArray<TSource>(IEnumerable<TSource>) |
Creates an array from a IEnumerable<T>. |
ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function. |
ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function and key comparer. |
ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions. |
ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function, a comparer, and an element selector function. |
ToHashSet<TSource>(IEnumerable<TSource>) |
Creates a HashSet<T> from an IEnumerable<T>. |
ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Creates a HashSet<T> from an IEnumerable<T> using the |
ToList<TSource>(IEnumerable<TSource>) |
Creates a List<T> from an IEnumerable<T>. |
ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function. |
ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function and key comparer. |
ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to specified key selector and element selector functions. |
ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function. |
TryGetNonEnumeratedCount<TSource>(IEnumerable<TSource>, Int32) |
Attempts to determine the number of elements in a sequence without forcing an enumeration. |
Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set union of two sequences by using the default equality comparer. |
Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set union of two sequences by using a specified IEqualityComparer<T>. |
UnionBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource,TKey>) |
Produces the set union of two sequences according to a specified key selector function. |
UnionBy<TSource,TKey>(IEnumerable<TSource>, IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Produces the set union of two sequences according to a specified key selector function. |
Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Filters a sequence of values based on a predicate. |
Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>) |
Produces a sequence of tuples with elements from the two specified sequences. |
Zip<TFirst,TSecond,TThird>(IEnumerable<TFirst>, IEnumerable<TSecond>, IEnumerable<TThird>) |
Produces a sequence of tuples with elements from the three specified sequences. |
Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>) |
Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results. |
AsParallel(IEnumerable) |
Enables parallelization of a query. |
AsParallel<TSource>(IEnumerable<TSource>) |
Enables parallelization of a query. |
AsQueryable(IEnumerable) |
Converts an IEnumerable to an IQueryable. |
AsQueryable<TElement>(IEnumerable<TElement>) |
Converts a generic IEnumerable<T> to a generic IQueryable<T>. |
Ancestors<T>(IEnumerable<T>) |
Returns a collection of elements that contains the ancestors of every node in the source collection. |
Ancestors<T>(IEnumerable<T>, XName) |
Returns a filtered collection of elements that contains the ancestors of every node in the source collection. Only elements that have a matching XName are included in the collection. |
DescendantNodes<T>(IEnumerable<T>) |
Returns a collection of the descendant nodes of every document and element in the source collection. |
Descendants<T>(IEnumerable<T>) |
Returns a collection of elements that contains the descendant elements of every element and document in the source collection. |
Descendants<T>(IEnumerable<T>, XName) |
Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection. |
Elements<T>(IEnumerable<T>) |
Returns a collection of the child elements of every element and document in the source collection. |
Elements<T>(IEnumerable<T>, XName) |
Returns a filtered collection of the child elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection. |
InDocumentOrder<T>(IEnumerable<T>) |
Returns a collection of nodes that contains all nodes in the source collection, sorted in document order. |
Nodes<T>(IEnumerable<T>) |
Returns a collection of the child nodes of every document and element in the source collection. |
Remove<T>(IEnumerable<T>) |
Removes every node in the source collection from its parent node. |
Applies to
See also
משוב
https://aka.ms/ContentUserFeedback.
בקרוב: במהלך 2024, נפתור בעיות GitHub כמנגנון המשוב לתוכן ונחליף אותו במערכת משוב חדשה. לקבלת מידע נוסף, ראה:שלח והצג משוב עבור