SourceToTargetViewModel was added

Windows/ViewModels/ISourceToTargetViewModel.cs

@@ -0,0 +1,25 @@
+using StructureHelper.Infrastructure;
+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 ISourceToTargetViewModel<TItem>
+    {
+        TItem SelectedSourceItem { get; set; }
+        TItem SelectedTargetItem { get; set; }
+        ObservableCollection<TItem> SourceItems { get; }
+        ObservableCollection<TItem> TargetItems { get; }
+        RelayCommand AddAll { get; }
+        RelayCommand ClearAll { get; }
+        RelayCommand AddSelected { get; }
+        RelayCommand RemoveSelected { get; }
+        void SetSourceItems(IEnumerable<TItem> allowedItems);
+        void SetTargetItems(IEnumerable<TItem> targetItems);
+        IEnumerable<TItem> GetTargetItems();
+    }
+}