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X509Certificate.Import Method (String)

Populates the X509Certificate object with information from a certificate file.

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

[ComVisibleAttribute(false)]
[PermissionSetAttribute(SecurityAction.InheritanceDemand, Unrestricted = true)]
public virtual void Import(
	string fileName
)

Parameters

fileName
Type: System.String

The name of a certificate file represented as a string.

ExceptionCondition
ArgumentException

The fileName parameter is null.

This method uses a certificate file (such as a file with a .cer extension) that represents an X.509 certificate, and populates the X509Certificate object with the certificate that the file contains.

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;


class X509
{

    static void Main()
    {

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

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

        cert.Import(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, 4.5, 4, 3.5, 3.0, 2.0

.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

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