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StringCollection.IList.IndexOf Method

Searches for the specified Object and returns the zero-based index of the first occurrence within the entire StringCollection.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)
int IList.IndexOf(
	Object value
)

Parameters

value
Type: System.Object

The Object to locate in the StringCollection. The value can be null.

Return Value

Type: System.Int32
The zero-based index of the first occurrence of value within the entire StringCollection, if found; otherwise, -1.

Implements

IList.IndexOf(Object)

The StringCollection is searched forward starting at the first element and ending at the last element.

This method determines equality by calling Object.Equals.

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

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.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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