Unprotects the specified data, which was protected by the
public static byte Unprotect(
params string purposes
Parameters protectedData Type: System .Byte 
The ciphertext data to unprotect.
purposes Type: System .String 
A list of purposes that describe what the data is meant for. This must be the same value that was passed to the
method when the data was protected. Protect
Exception Condition ArgumentNullException
protectedData parameter is null. ArgumentException
The purposes array contains one or more whitespace-only entries.
Possible causes include the following:
The protected data was tampered with.
The value of the
purposes parameter is not the same as the value that was specified when the data was protected.
The application is deployed to more than one server and is using auto-generated encryption keys.
For information about this method, see the
method. Protect .NET Framework
Supported in: 4.5.2, 4.5.1, 4.5
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.