ReadOnlyCollection(Of T).IndexOf Method

Searches for the specified object and returns the zero-based index of the first occurrence within the entire ReadOnlyCollection(Of T).

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

'Declaration
Public Function IndexOf ( _
	value As T _
) As Integer

Parameters

value
Type: T
The object to locate in the List(Of T). The value can be Nothing for reference types.

Return Value

Type: System.Int32
The zero-based index of the first occurrence of item within the entire ReadOnlyCollection(Of T), if found; otherwise, -1.

Implements

IList(Of T).IndexOf(T)

The ReadOnlyCollection(Of T) is searched forward starting at the first element and ending at the last element.

This method determines equality using the default comparer EqualityComparer(Of T).Default.

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

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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