ServicePointManager.CertificatePolicy Property

When the CertificatePolicy property is set to an ICertificatePolicy interface object, the ServicePointManager object uses the certificate policy defined in that instance instead of the default certificate policy.

The default certificate policy allows valid certificates and valid certificates that have expired.

The following code example shows how to catch a certificate policy exception for a custom certificate policy. It assumes that the certificate policy object has been defined, that the Uniform Resource Identifier (URI) for the Web resource is contained in the variable myUri, and that there is a method named ProcessResponse that performs the work of the application.

ServicePointManager.CertificatePolicy = new MyCertificatePolicy();

       // Create the request and receive the response
       try
       {
       WebRequest myRequest = WebRequest.Create(myUri);
       WebResponse myResponse = myRequest.GetResponse();
       ProcessResponse(myResponse);
       myResponse.Close();
       }
       // Catch any exceptions
       catch(WebException e)
       {
       if (e.Status == WebExceptionStatus.TrustFailure)
       {
       // Code for handling security certificate problems goes here.
       }
       // Other exception handling goes here
       }
   

.NET Framework

.NET Framework Client Profile

• SecurityPermission  

  To set the CertificatePolicy property. Associated enumeration: SecurityPermissionFlag.UnmanagedCode

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference