IndexOf(String) Method

Returns the index of the item in the collection that has the passed in key or -1 if no item is found.

Syntax

Visual Basic

'Declaration
 
Public Overloads Overridable Function IndexOf( _
   ByVal key As String _
) As Integer

C#

public virtual int IndexOf( 
   string key
)

Parameters

key

The key of the item whose index is to be returned.

Return Value

The index of the item in the collection that has the passed in key, or -1 if no item is found.

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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