ReadOnlyCollection<T>.IList.Add Method

Adds an item to the IList. This implementation always throws NotSupportedException.

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

int IList.Add(
	Object value
)

Parameters

value
Type: System.Object

The Object to add to the IList.

Return Value

Type: System.Int32
The position into which the new element was inserted.

Implements

IList.Add(Object)

ExceptionCondition
NotSupportedException

Always thrown.

This member is an explicit interface member implementation. It can be used only when the ReadOnlyCollection<T> instance is cast to an IList interface.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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