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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.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows Phone 8.1, Windows Phone 8, 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.

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