Array.IsReadOnly Property


Gets a value indicating whether the Array is read-only.

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

Public ReadOnly Property IsReadOnly As Boolean

Property Value

Type: System.Boolean

This property is always false for all arrays.

Array implements the IsReadOnly property because it is required by the System.Collections.IList interface. An array that is read-only does not allow the addition, removal, or modification of elements after the array is created.

If you require a read-only collection, use a System.Collections class that implements the System.Collections.IList interface.

If you cast or convert an array to an IList interface object, the IList.IsReadOnly property returns false. However, if you cast or convert an array to a IList(Of T) interface, the IsReadOnly property returns true.

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

.NET Framework
Available since 1.1
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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