Create LiteMainWindowViewModel.cs in lite-ui branch

ViewModels/LiteMainWindowViewModel.cs

@@ -0,0 +1,19 @@
+// LiteMainWindowViewModel.cs
+
+using System;
+using System.ComponentModel;
+
+namespace v2rayN.ViewModels
+{
+    public class LiteMainWindowViewModel : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        // Properties, methods, and other members can be added here.
+
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}