Give a default port 50052 rather than -1

Tools/AlarmInfoServerSim/ViewModels/StatusBarViewModel.cs

@@ -47,7 +47,7 @@ public partial class StatusBarViewModel : ObservableObject
         _iPAddresses = _sharedConfig.IPAddresses;
         _isSelectingEnable=true;
         _selectedIP = IPAddress.None;
-        _selectedPort = -1;
+        _selectedPort = 50052;
         _buttonContent = "Open";
         _remoteIp =IPAddress.None;
         _remotePort = -1;