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RecipientInfo Class

The RecipientInfo class represents information about a CMS/PKCS #7 message recipient. The RecipientInfo class is an abstract class inherited by the KeyAgreeRecipientInfo and KeyTransRecipientInfo classes.

Namespace:  System.Security.Cryptography.Pkcs
Assembly:  System.Security (in System.Security.dll)

[HostProtectionAttribute(SecurityAction.LinkDemand, MayLeakOnAbort = true)]
public abstract class RecipientInfo

The RecipientInfo type exposes the following members.

Public propertyEncryptedKeyThe EncryptedKey abstract property retrieves the encrypted recipient keying material.
Public propertyKeyEncryptionAlgorithmThe KeyEncryptionAlgorithm abstract property retrieves the algorithm used to perform the key establishment.
Public propertyRecipientIdentifierThe RecipientIdentifier abstract property retrieves the identifier of the recipient.
Public propertyTypeThe Type property retrieves the type of the recipient. The type of the recipient determines which of two major protocols is used to establish a key between the originator and the recipient of a CMS/PKCS #7 message.
Public propertyVersionThe Version abstract property retrieves the version of the recipient information. Derived classes automatically set this property for their objects, and the value indicates whether it is using PKCS #7 or Cryptographic Message Syntax (CMS) to protect messages. The version also implies whether the RecipientInfo object establishes a cryptographic key by a key agreement algorithm or a key transport algorithm.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

This is an abstract class that cannot be instantiated. It is inherited by the KeyAgreeRecipientInfo and KeyTransRecipientInfo classes.


The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: MayLeakOnAbort. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

.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.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.