WPF endgültiv vorbereitet

GuiWPF/ViewModelBase.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -10,7 +11,7 @@ namespace GuiWPF
     public abstract class ViewModelBase : INotifyPropertyChanged
     {
         public event PropertyChangedEventHandler PropertyChanged;
-        protected void OnPropertyChanged(string propertyName)
+        protected void OnPropertyChanged([CallerMemberName]string propertyName = "")
         {
             this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
         }