- init: initial think

Nebula.Launcher/ViewModels/TestViewModel.cs

@@ -0,0 +1,21 @@
+using System;
+using ReactiveUI;
+
+namespace Nebula.Launcher.ViewModels;
+
+public sealed class TestViewModel : ViewModelBase
+{
+    private string _greeting = "Welcome to Avalonia!";
+
+    public string Greeting
+    {
+        get => _greeting;
+        set => this.RaiseAndSetIfChanged(ref _greeting,  value);
+    }
+
+    public void ButtonAction()
+    {
+        Console.WriteLine("HAS");
+        Greeting = "Another greeting from Avalonia";
+    }
+}

Nebula.Launcher/ViewModels/ViewModelBase.cs

@@ -0,0 +1,7 @@
+using ReactiveUI;
+
+namespace Nebula.Launcher.ViewModels;
+
+public abstract class ViewModelBase : ReactiveObject
+{
+}