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CryptographicAttributeObjectCollection.Add Method (CryptographicAttributeObject)

Adds the specified CryptographicAttributeObject object to the collection.

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

public int Add(
	CryptographicAttributeObject attribute
)

Parameters

attribute
Type: System.Security.Cryptography.CryptographicAttributeObject

The CryptographicAttributeObject 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.

ExceptionCondition
ArgumentNullException

asnEncodedData is null.

CryptographicException

A cryptographic operation could not be completed.

InvalidOperationException

The specified item already exists in the collection.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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