viewmodel ins wpf gepackt, build failed

DaSaSo.Wpf/ViewModel/Interface/IViewModelSewerMainFactory.cs

@@ -0,0 +1,14 @@
+using DaSaSo.Domain.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DaSaSo.Wpf.ViewModel.Interface
+{
+    public  interface IViewModelSewerMainFactory
+    {
+        BaseViewModel CreateViewModel(ESewerWindowViewType viewType);
+    }
+}