Extension object
[CAPICOM is a 32-bit only component that is available for use in the following operating systems: Windows Server 2008, Windows Vista, and Windows XP. Instead, use the X509Extension Class in the System.Security.Cryptography.X509Certificates namespace.]
The Extension object represents a single certificate extension.
When to use
The Extension object is used to perform the following tasks:
- Retrieve the OID of the certificate extension.
- Retrieve the certificate extension data represented by an EncodedData object.
- Determine whether the certificate extension is marked as critical.
Members
The Extension object has these types of members:
Properties
The Extension object has these properties.
| Property | Access type | Description |
|---|---|---|
| EncodedData |
Read-only |
Retrieves the encoded data for the extension. |
| IsCritical |
Read-only |
Retrieves a Boolean value that indicates whether the extension is marked critical. |
| OID |
Read-only |
Retrieves the object identifier for the extension. This is the default property. |
Remarks
The Extension object cannot be created.
The Extension object is used by the Extensions collection object.
Requirements
| Requirement | Value |
|---|---|
| End of client support |
Windows Vista |
| End of server support |
Windows Server 2008 |
| Redistributable |
CAPICOM 2.0 or later on Windows Server 2003 and Windows XP |
| Header |
|
| DLL |
|