Collection<T>.IList.Contains(Object) Method

Reference

Definition

Namespace:: System.Collections.ObjectModel

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: Collection.cs

Source:: Collection.cs

Source:: Collection.cs

Important

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Determines whether the IList contains a specific value.

 virtual bool System.Collections.IList.Contains(System::Object ^ value) = System::Collections::IList::Contains;

bool IList.Contains (object value);

abstract member System.Collections.IList.Contains : obj -> bool
override this.System.Collections.IList.Contains : obj -> bool

Function Contains (value As Object) As Boolean Implements IList.Contains

Parameters

value: Object

The Object to locate in the IList.

Returns

Boolean

true if the Object is found in the IList; otherwise, false.

Implements

Contains(Object)

Exceptions

ArgumentException

value is of a type that is not assignable to the IList.

Remarks

This method determines equality by first determining whether value is of type T (or null) and then calling Contains.

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

Applies to

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