GetPublicKey Method

X509Certificate.GetPublicKey Method ()

 

Returns the public key for the X.509v3 certificate as an array of bytes.

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

public virtual byte[] GetPublicKey()

Return Value

Type: System.Byte[]

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

Exception Condition
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);
        }

    }

}

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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