.ObjectCollection .IndexOf Method
.NET Framework 4.6 and 4.5
Retrieves the index within the collection of the specified item.
public int IndexOf(
Parameters value Type: System .Object
An object representing the item to locate in the collection.
System .Int32 The zero-based index where the item is located within the collection; otherwise, -1. Implements IList .IndexOf(Object)
method enables you to determine where an item is located within the collection. To determine if an item is located within the collection before calling this method, use the IndexOf method. Contains .NET Framework
Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
.NET Framework Client Profile
Supported in: 4, 3.5 SP1