List(Of T).IList.IndexOf Method (Object)

 

Determines the index of a specific item in the IList.

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

Private Function IndexOf (
	item As Object
) As Integer
	Implements IList.IndexOf

Parameters

item
Type: System.Object

The object to locate in the IList.

Return Value

Type: System.Int32

The index of item if found in the list; otherwise, –1.

Exception Condition
ArgumentException

item is of a type that is not assignable to the IList.

This method determines equality using the default equality comparer EqualityComparer(Of T).Default for T, the type of values in the list.

This method performs a linear search; therefore, this method is an O(n) operation, where n is Count.

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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