LinePrimitive and RectanglePrimitive was added

StructureHelperCommon/Infrastructures/Interfaces/ISaveable.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Infrastructures.Interfaces
+{
+    public interface ISaveable
+    {
+        int Id { get; set; }
+        void Save();
+    }
+}