IDictionary.IsFixedSize Property

Dictionary<TKey, TValue>.IDictionary.IsFixedSize Property

Gets a value indicating whether the IDictionary has a fixed size.

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

bool IDictionary.IsFixedSize { get; }

Property Value

Type: System.Boolean
true if the IDictionary has a fixed size; otherwise, false. In the default implementation of Dictionary<TKey, TValue>, this property always returns false.



A collection with a fixed size does not allow the addition or removal of elements after the collection is created, but it allows the modification of existing elements.

A collection with a fixed size is simply a collection with a wrapper that prevents adding and removing elements; therefore, if changes are made to the underlying collection, including the addition or removal of elements, the fixed-size collection reflects those changes.

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


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.

Community Additions

© 2015 Microsoft