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Dictionary<TKey, TValue>.KeyCollection.ICollection<TKey>.IsReadOnly Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets a value indicating whether the ICollection<T> is read-only.

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

Syntax

'Declaration
Private ReadOnly Property IsReadOnly As Boolean
    Implements ICollection(Of TKey).IsReadOnly

bool ICollection<TKey>.IsReadOnly { get; }

Property Value

Type: System.Boolean
true if the ICollection<T> is read-only; otherwise, false. In the default implementation of Dictionary<TKey, TValue>.KeyCollection, this property always returns true.

Implements

ICollection<T>.IsReadOnly

Remarks

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

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

Version Information

Silverlight

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

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.