ViewModels in eigene DLL gepackt

KanSan.ViewModel/PropertyChangedClass.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Text;
+
+namespace KanSan.ViewModel
+{
+    public class PropertyChangedClass
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected internal void OnPropertyChanged([CallerMemberName] string propertyname = null)
+        {
+            if (PropertyChanged != null)
+                PropertyChanged(this, new PropertyChangedEventArgs(propertyname));
+        }
+    }
+}