Dictionary<TKey,TValue>.ValueCollection.ICollection<TValue>.Contains Method

Reference

Definition

Namespace:: System.Collections.Generic

Assembly:: System.Collections.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Dictionary.cs

Source:: Dictionary.cs

Source:: Dictionary.cs

Important

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Determines whether the ICollection<T> contains a specific value.

 virtual bool System.Collections.Generic.ICollection<TValue>.Contains(TValue item) = System::Collections::Generic::ICollection<TValue>::Contains;

bool ICollection<TValue>.Contains (TValue item);

abstract member System.Collections.Generic.ICollection<TValue>.Contains : 'Value -> bool
override this.System.Collections.Generic.ICollection<TValue>.Contains : 'Value -> bool

Function Contains (item As TValue) As Boolean Implements ICollection(Of TValue).Contains

Parameters

item: TValue

The object to locate in the ICollection<T>.

Returns

Boolean

true if item is found in the ICollection<T>; otherwise, false.

Implements

Contains(T)

Remarks

Implementations can vary in how they determine equality of objects; for example, List<T> uses Default, whereas, Dictionary<TKey,TValue> allows the user to specify the IComparer<T> implementation to use for comparing keys.

This method is an O(n) operation, where n is Count.

Applies to

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