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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.

ExceptionCondition
ObjectDisposedException

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.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.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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