viewmodel ins wpf gepackt, build failed

DaSaSo.Wpf/ViewModel/Interface/ISewerMainNavigator.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DaSaSo.Wpf.ViewModel.Interface
+{
+    public interface ISewerMainNavigator : INavigator
+    {
+    }
+}