Collection(Of T).ICollection(Of T).IsReadOnly Property
.NET Framework (current version)
Gets a value indicating whether the ICollection(Of T) is read-only.
Assembly: mscorlib (in mscorlib.dll)
Property Value
Type: System.Booleantrue 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).IsReadOnlyA 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.
Universal Windows Platform
Available since 8
.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
Available since 8
.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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