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ReadOnlyCollection(Of T).ICollection(Of T).IsReadOnly Property

Gets a value indicating whether the ICollection(Of T) is read-only.

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

'Declaration
Private ReadOnly Property IsReadOnly As Boolean 
	Implements ICollection(Of T).IsReadOnly

Property Value

Type: System.Boolean
true if the ICollection(Of T) is read-only; otherwise, false. In the default implementation of ReadOnlyCollection(Of T), this property always returns true.

Implements

ICollection(Of T).IsReadOnly

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.

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

This member is an explicit interface member implementation. It can be used only when the ReadOnlyCollection(Of T) instance is cast to an IDisposable 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

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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