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X509Certificate.GetPublicKey Method

Returns the public key for the X.509v3 certificate.

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

public virtual byte[] GetPublicKey ()
public byte[] GetPublicKey ()
public function GetPublicKey () : byte[]
Not applicable.

Return Value

The public key for the X.509 certificate as an array of bytes.

Exception typeCondition

CryptographicException

The certificate context is invalid.

The following example uses the GetPublicKey method to return a certificate's public key as an array of bytes and displays it 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 = X509Certificate.CreateFromCertFile(Certificate);

        // Get the value.
        byte[] results = cert.GetPublicKey();
       
        // Display the value to the console.
        foreach(byte b in results)
        {
            Console.Write(b);
        }
  
    }

}

import System.*;
import System.Security.Cryptography.X509Certificates.*;

public class X509
{
    public static void main(String[] args)
    {
        // The path to the certificate.
        String certificate = "Certificate.cer";

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

        // Get the value.
        ubyte results[] = cert.GetPublicKey();

        // Display the value to the console.
        for (int iCtr = 0; iCtr < results.get_Length(); iCtr++) {
            ubyte b = results[iCtr];
            Console.Write(b);
        }
    } //main 
} //X509

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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