IsReadOnly Method

SecureString.IsReadOnly Method

Indicates whether this secure string is marked read-only.

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

public bool IsReadOnly()

Return Value

Type: System.Boolean
true if this secure string is marked read-only; otherwise, false.


This secure string has already been disposed.

After an instance of SecureString is marked read-only by the MakeReadOnly method, any attempt to modify the value of the instance throws an InvalidOperationException. Use the IsReadOnly method to test whether a SecureString is read-only.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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