How to install certificate using c# to Server

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C#

ASP.NET

IIS

Hi I had coded to install certificate on server as under.

private static void InstallCertificate(string cerFileName, string cerPass )
{
    X509Certificate2 certificate ;

      if (String.IsNullOrEmpty(cerPass))
             certificate = new X509Certificate2(filename);
      else
          certificate =   new X509Certificate2(cerFileName,cerPass);

    X509Store store = new X509Store(StoreName.TrustedPublisher, StoreLocation.LocalMachine);

    store.Open(OpenFlags.ReadWrite);
    store.Add(certificate);
    store.Close();
}

this code fails when I have certificate with password I can install the certificate in my local pc with the same password what to do in this case?

Error Invalid Access when certificate with password is passed.