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CryptographicAttributeObjectCollection.Add Method (AsnEncodedData)

Adds the specified AsnEncodedData object to the collection.

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

public int Add(
	AsnEncodedData asnEncodedData


Type: System.Security.Cryptography.AsnEncodedData

The AsnEncodedData object to add to the collection.

Return Value

Type: System.Int32
true if the method returns the zero-based index of the added item; otherwise, false.


asnEncodedData is null.


A cryptographic operation could not be completed.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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