Developer Network Developer Network Developer
Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

ICollection<T>.Contains Method

.NET Framework 4.6 and 4.5

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

Namespace:  System.Collections.Generic
Assembly:  mscorlib (in mscorlib.dll)

C#
C++
F#
JScript
VB
Copy 
bool Contains(
	T item
)

Parameters

item
Type: T

The object to locate in the ICollection<T>.

Return Value

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

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
Show:
© 2015 Microsoft