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Collection(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 Collection(Of T), this property always returns false.

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.

.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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