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Array.IsReadOnly Property

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

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

public bool IsReadOnly { get; }

Property Value

Type: System.Boolean
This property is always false for all arrays.

Implements

IList.IsReadOnly

Array implements the IsReadOnly property because it is required by the System.Collections.IList interface.

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

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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