Returns the expiration date of this X.509v3 certificate.
Assembly: mscorlib (in mscorlib.dll)
The expiration date is the date after which the X.509 certificate is no longer considered valid.
The 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.
This method may return a different string format on Macintosh computers, although the underlying DateTime object will represent the same value.
The following example uses the method to get the expatriation date of a certificate and displays it to the console.
Imports System 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
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.