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SynchronizedCollection<T>.IndexOf Method

Returns the index of the first occurrence of a value in the collection.

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

public int IndexOf(
	T item


Type: T
Removes all items from the collection.

Return Value

Type: System.Int32
The zero-based index of the first occurrence of the value in the collection.




The value set is null or is not of the correct generic type T for the collection.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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