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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: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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