Grundlegene Funktionen geschrieben

dcnsanplanung.wpf/ViewModel/BaseViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace dcnsanplanung.wpf.ViewModel
+{
+    internal class BaseViewModel : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        void OnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            if(PropertyChanged != null)
+            {
+                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+            }
+        }
+    }
+}