X509Certificate.GetExpirationDateString Method

Definition

Namespace:

System.Security.Cryptography.X509Certificates

Assemblies:

netstandard.dll, System.Security.Cryptography.dll

Source:

X509Certificate.cs

Returns the expiration date of this X.509v3 certificate.

C#

public virtual string GetExpirationDateString();

Returns

String

The expiration date for this X.509 certificate.

Examples

The following example uses the GetExpirationDateString method to get the expiration date of a certificate and displays it to the console.

C#

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 results = cert.GetExpirationDateString();

        // Display the value to the console.
        Console.WriteLine(results);
    }
}

Remarks

The expiration date is the date after which the X.509 certificate is no longer considered valid.

The GetExpirationDateString method returns a string that shows the date formatted in Short Date Pattern followed by the time formatted in Long Time Pattern. The date and time are formatted using the current culture and time zone.

Note

This method may return a different string format on Macintosh computers, although the underlying DateTime object will represent the same value.

Applies to