Dictionary.ValueCollection.System.Collections.Generic.ICollection<TValue>.Contains Method 

Determines whether the ICollection contains a specific value.

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

Syntax

'Declaration
Private Function System.Collections.Generic.ICollection<TValue>.Contains ( _
    item As TValue _
) As Boolean Implements ICollection(Of TValue).Contains
'Usage
Dim instance As ValueCollection
Dim item As TValue
Dim returnValue As Boolean

returnValue = CType(instance, ICollection(Of TValue)).Contains(item)

bool ICollection<TValue>.Contains (
    TValue item
)

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

Not applicable.

Parameters

• item
  The object to locate in the ICollection.

Return Value

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

Remarks

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

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

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

See Also

Reference

Dictionary.ValueCollection Generic Class
Dictionary.ValueCollection Members
System.Collections.Generic Namespace