SourceToTargetViewModel was added

Windows/ViewModels/ICRUDViewModel.cs

@@ -0,0 +1,20 @@
+using StructureHelper.Infrastructure;
+using StructureHelperLogics.NdmCalculations.Analyses;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Windows.ViewModels
+{
+    public interface ICRUDViewModel<TItem>
+    {
+        TItem SelectedItem { get; set; }
+        ObservableCollection<TItem> Items { get; }
+        RelayCommand Add { get; }
+        RelayCommand Delete { get; }
+        RelayCommand Edit { get; }
+    }
+}