X509Certificate.GetExpirationDateString Method

Definition

Namespace:

System.Security.Cryptography.X509Certificates

Assembly:

System.Security.Cryptography.dll

Source:

X509Certificate.cs

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

public:
 virtual System::String ^ GetExpirationDateString();

public virtual string GetExpirationDateString ();

abstract member GetExpirationDateString : unit -> string
override this.GetExpirationDateString : unit -> string

Public Overridable Function GetExpirationDateString () As String

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.

using namespace System;
using namespace System::Security::Cryptography::X509Certificates;
int 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 );
}

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);
    }
}

Imports System.Security.Cryptography.X509Certificates




Public Class X509
   
   
   Public Shared Sub Main()
      
      ' The path to the certificate.
      Dim Certificate As String = "Certificate.cer"
      
      ' Load the certificate into an X509Certificate object.
      Dim cert As X509Certificate = X509Certificate.CreateFromCertFile(Certificate)
      
      ' Get the value.
      Dim results As String = cert.GetExpirationDateString()
      
      ' Display the value to the console.
      Console.WriteLine(results)
   End Sub  
End Class

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.