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ListBox.IntegerCollection.IndexOf Method

Retrieves the index within the ListBox.IntegerCollection of the specified integer.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public int IndexOf(
	int item


Type: System.Int32
The integer for which to retrieve the index.

Return Value

Type: System.Int32
The zero-based index of the integer in the ListBox.IntegerCollection; otherwise, negative one (-1).

Use the IndexOf method to determine where an item is located within the collection. To determine whether an item is located within the collection before calling this method, use the Contains method.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.