wip

ClientApp/ViewModels/LoginViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using ClientApp.Utils;
+
+namespace ClientApp.ViewModels
+{
+    class LoginViewModel : ObservableObject
+    {
+    }
+}

ClientApp/ViewModels/MainViewModel.cs

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+using ClientApp.Utils;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ClientApp.ViewModels
+{
+    class MainViewModel : ObservableObject
+    {
+
+        public ObservableObject SelectedViewModel { get; set; }
+
+        public MainViewModel()
+        {
+            SelectedViewModel = new LoginViewModel();
+        }
+    }
+}