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X509Certificate.CreateFromCertFile Method

Creates an X.509v3 certificate from the specified PKCS7 signed file.

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

public static X509Certificate CreateFromCertFile(
	string filename
)

Parameters

filename
Type: System.String

The path of the PKCS7 signed file from which to create the X.509 certificate.

Return Value

Type: System.Security.Cryptography.X509Certificates.X509Certificate
The newly created X.509 certificate.

ExceptionCondition
ArgumentException

The filename parameter is null.

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

NoteNote

The certificate file is not restricted to .cerfiles. Any PKCS7 signed file can be used, including an Authenticode signed .pfx file.

The following example creates an X509Certificate from a specified certification file.


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. 
        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);

    }

}

.NET Framework

Supported in: 4.6, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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