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X509Certificate Constructor (String)

Note: This constructor is new in the .NET Framework version 2.0.

Initializes a new instance of the X509Certificate class using a using a certificate file name.

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

public X509Certificate (
	string fileName
)
public X509Certificate (
	String fileName
)
public function X509Certificate (
	fileName : String
)

Parameters

fileName

The name of a certificate file.

Exception typeCondition

ArgumentException

The fileName parameter is a null reference (Nothing in Visual Basic).

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

The following code 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);

    }

}

  • FileIOPermission  for permission to read the file described by the fileName parameter. Associated enumeration: Read Security action: Demand
  • KeyContainerPermission  for permission to create a key container. Associated enumeration: Create Security action: Demand

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

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