View primitives was fixed

Infrastructure/UI/DataContexts/IHasCenter.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Infrastructure.UI.DataContexts
+{
+    internal interface IHasCenter
+    {
+        double PrimitiveLeft { get; }
+        double PrimitiveTop { get; }
+    }
+}