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FormsAuthentication.Decrypt Method

Creates a FormsAuthenticationTicket object based on the encrypted forms-authentication ticket passed to the method.

Namespace:  System.Web.Security
Assembly:  System.Web (in System.Web.dll)
public static FormsAuthenticationTicket Decrypt(
	string encryptedTicket
)

Parameters

encryptedTicket
Type: System.String

The encrypted authentication ticket.

Return Value

Type: System.Web.Security.FormsAuthenticationTicket
A FormsAuthenticationTicket object. If the encryptedTicket parameter is not a valid ticket, null is returned.
ExceptionCondition
ArgumentException

encryptedTicket is null.

- or -

encryptedTicket is an empty string ("").

- or -

The length of encryptedTicket is greater than 4096 characters.

- or -

encryptedTicket is of an invalid format.

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, 1.1, 1.0
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