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Dictionary.System.Collections.IDictionary.IsReadOnly Property

Gets a value indicating whether the IDictionary is read-only.

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

bool IDictionary.IsReadOnly { get; }
Not applicable.

Property Value

true if the IDictionary is read-only; otherwise, false. In the default implementation of Dictionary, this property always returns false.

A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created.

A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection; therefore, if changes are made to the underlying collection, the read-only collection reflects those changes.

Getting the value of this property is an O(1) operation.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0
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