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X509Certificate Class

Provides methods that help you use X.509 v.3 certificates.

Namespace: System.Security.Cryptography.X509Certificates
Assembly: mscorlib (in mscorlib.dll)

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public class X509Certificate : IDeserializationCallback, ISerializable
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class X509Certificate implements IDeserializationCallback, ISerializable
SerializableAttribute 
ComVisibleAttribute(true) 
public class X509Certificate implements IDeserializationCallback, ISerializable

ASN.1 DER is the only certificate format supported by this class.

For most scenarios, you should use the X509Certificate2 class instead.

The following example loads an X.509 certificate from a file, calls the ToString method and displays the results to the console.

using System;
using System.Security.Cryptography.X509Certificates;


public class X509
{

    public static void Main()
    {

        // The path to the certificate.
        string Certificate = "Certificate.cer";

        // Load the certificate into an X509Certificate object.
        X509Certificate cert = new X509Certificate(Certificate);

        // Get the value.
        string resultsTrue = cert.ToString(true);

        // Display the value to the console.
        Console.WriteLine(resultsTrue);

        // Get the value.
        string resultsFalse = cert.ToString(false);

        // Display the value to the console.
        Console.WriteLine(resultsFalse);

    }

}

System.Object
  System.Security.Cryptography.X509Certificates.X509Certificate
     System.Security.Cryptography.X509Certificates.X509Certificate2

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

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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