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ReadOnlyCollection(Of T).IList.Contains Method

Determines whether the IList contains a specific value.

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

'Declaration
Private Function Contains ( _
	value As Object _
) As Boolean Implements IList.Contains
'Usage
Dim instance As ReadOnlyCollection 
Dim value As Object 
Dim returnValue As Boolean 

returnValue = CType(instance, IList).Contains(value)

Parameters

value
Type: System.Object

The Object to locate in the IList.

Return Value

Type: System.Boolean
true if the Object is found in the IList; otherwise, false.

Implements

IList.Contains(Object)

ExceptionCondition
ArgumentException

value is not of the type specified for the generic type parameter T.

This method determines equality using the default comparer EqualityComparer(Of T).Default.

This method performs a linear search; therefore, this method is an O(n) operation, where n is Count.

This member is an explicit interface member implementation. It can be used only when the ReadOnlyCollection(Of T) instance is cast to an IList interface.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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