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IListContract<T>.IndexOf Method

Returns the index of a specific item in an IListContract<C> collection.

Namespace:  System.AddIn.Contract
Assembly:  System.AddIn.Contract (in System.AddIn.Contract.dll)

int IndexOf(
	T item


Type: T

An item in the collection.

Return Value

Type: System.Int32
The index of the specified item.


index is less than zero.


index is equal to or greater than the return value of the GetCount method.

If there are several objects of the same type in the collection, this method identifies the index of the item that is the first occurrence of the specified type in the collection.

The GetItem method does not remove the item at the specified index. To remove an item from the IListContract<T> collection, use the RemoveAt method.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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