MVVM Implementing started

SewerStammGen/ViewModel/ObservableObject.cs

@@ -0,0 +1,14 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace SewerStammGen.ViewModel
+{
+    public class ObservableObject : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler? PropertyChanged;
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}