Datenschnittstelle erweitert

GuiWPF/ViewModel/ViewModelBase.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GuiWPF
+{
+    public abstract class ViewModelBase : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected void OnPropertyChanged([CallerMemberName]string propertyName = "")
+        {
+            this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
+        }
+
+        protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
+        {
+            var handler = this.PropertyChanged;
+            if (handler != null)
+                handler(this, e);
+        }
+    }
+}