private void SetProperHelpMessage()
 {
     if (string.IsNullOrEmpty(VIN))
     {
         HelpMessage = Resources.msgSecurityVEHICLEScan;
         Background  = new SolidColorBrush(Colors.White);
     }
     else
     {
         if (!string.IsNullOrEmpty(GatePass) && GatePass.Length != 8)
         {
             HelpMessage = Resources.msgSecurityGatePass;
             Background  = new SolidColorBrush(Colors.Orange);
             if (GatePass.Length != 8)
             {
                 if (GatePass.Length > 8)
                 {
                     HelpMessage = Resources.msgSecurityLongGatePass;
                     Background  = new SolidColorBrush(Colors.IndianRed);
                 }
                 else
                 {
                     HelpMessage = Resources.msgSecurityShortGatePass;
                     Background  = new SolidColorBrush(Colors.IndianRed);
                 }
             }
         }
         else if (string.IsNullOrEmpty(GatePass))
         {
             HelpMessage = Resources.msgSecurityGatePass;
             Background  = new SolidColorBrush(Colors.Orange);
         }
         else if (!VIN.EndsWith(GatePass))
         {
             HelpMessage = Resources.msgSecurityNoMatch;
             Background  = new SolidColorBrush(Colors.IndianRed);
         }
         else
         {
             HelpMessage = Resources.msgSecurityMatch;
             Background  = new SolidColorBrush(Colors.Green);
         }
     }
 }
 private bool ProcessCommand_CanExecute(object obj)
 {
     return(!string.IsNullOrEmpty(VIN) &&
            !string.IsNullOrEmpty(GatePass) &&
            VIN.EndsWith(GatePass));
 }