string IVpaid.HandshakeVersion(string version)
 {
     if (HandshakeVersionRequested != null)
     {
         var args = new HandshakeVersionRequestedEventArgs(version);
         HandshakeVersionRequested(this, args);
         return args.Result;
     }
     else return "1.0";
 }
 string IVpaid.HandshakeVersion(string version)
 {
     if (HandshakeVersionRequested != null)
     {
         var args = new HandshakeVersionRequestedEventArgs(version);
         HandshakeVersionRequested(this, args);
         return(args.Result);
     }
     else
     {
         return("1.0");
     }
 }