Binding zu UserPermission führt im Designer nicht mehr zu Exception (Standardhaft zu true - hat Rechte)

BeWo/BeWoApp.xaml.cs

@@ -44,7 +44,6 @@ namespace BeWo
 	{
 		private static DebugMessageLogView _DebugMessageLogView;
 
-
 		private static FrameworkElement _lockedContent;
 
 		public static LoginControl LoginControl;
@@ -55,6 +54,8 @@ namespace BeWo
 
 		public static int RenderTier = 0;
 
+		public static bool IsInDesignMode = DesignerProperties.GetIsInDesignMode(new DependencyObject());
+
 		internal static string IpAddress = string.Empty;
 
 		internal static string Tenant = string.Empty;

BeWo/Converter/UserPermission2BoolConverter.cs

@@ -14,20 +14,28 @@ namespace BeWo.Converter
 	{
 		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
 		{
-			if (value is UserRightType type)
+			try
 			{
-				return BeWoApp.HasLoggedOnUserRight(type);
-			}
+				if (value is UserRightType type)
+				{
+					return BeWoApp.HasLoggedOnUserRight(type);
+				}
 
-			if (parameter is UserRightType type2)
-			{
-				return BeWoApp.HasLoggedOnUserRight(type2);
-			}
+				if (parameter is UserRightType type2)
+				{
+					return BeWoApp.HasLoggedOnUserRight(type2);
+				}
 
-			if (parameter is string setting && !string.IsNullOrWhiteSpace(setting))
+				if (parameter is string setting && !string.IsNullOrWhiteSpace(setting))
+				{
+					if (setting == SettingsKeys.AllowGkvAbrechnung)
+						return BeWoApp.AppSettings.AllowGkvAbrechnung;
+				}
+			}
+			catch (Exception)
 			{
-				if (setting == SettingsKeys.AllowGkvAbrechnung)
-					return BeWoApp.AppSettings.AllowGkvAbrechnung;
+				if (BeWoApp.IsInDesignMode)
+					return true;
 			}
 
 			return false;