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ActivityCollection.IList.IndexOf Method

Gets the zero-based index of the Object in the underlying activities collection.

Namespace:  System.Workflow.ComponentModel
Assembly:  System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)

private abstract IndexOf : 
        value:Object -> int  
private override IndexOf : 
        value:Object -> int


Type: System.Object

The Object to be indexed.

Return Value

Type: System.Int32
The zero-based index of the value in the underlying activities collection or -1 if not found in the collection.




The value is not of type Activity and the exception object contains "Error_InvalidListItem" error message.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

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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