public static void V_Test_X509_VerifyCert() { Console.WriteLine("Testing X509_VerifyCert ..."); // Returns 0 if OK, -1 if fails to validate, or +ve other error int nRet = 0; nRet = X509.VerifyCert("myuser.cer", "myca.cer"); if (nRet == 0) { Console.WriteLine("Verification is OK"); } else if (nRet > 0) { Console.WriteLine("Error: " + nRet + General.LastError()); } else { Console.WriteLine("Cert not issued by this Issuer"); } }