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Dictionary<TKey, TValue>.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; }

Property Value

Type: System.Boolean

true if the IDictionary is read-only; otherwise, false. In the default implementation of Dictionary<TKey, TValue>, 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.

Universal Windows Platform
Available since 4.5
.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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