IndexOf Method

IList::IndexOf Method (Object^)


Determines the index of a specific item in the IList.

Namespace:   System.Collections
Assembly:  mscorlib (in mscorlib.dll)

int IndexOf(
	Object^ value


Type: System::Object^

The object to locate in the IList.

Return Value

Type: System::Int32

The index of value if found in the list; otherwise, -1.

Starting with the .NET Framework 2.0, this method uses the collection’s objects’ Equals and CompareTo methods on item to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the Equals and CompareTo methods of the item parameter on the objects in the collection.

The following example demonstrates the implementation of the IList interface to create a simple list, fixed-size list. This code is part of a larger example for the IList interface.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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