FileWork examples were added

DataAccess/DTOs/CrossSectionDTO.cs

@@ -0,0 +1,21 @@
+using StructureHelperLogics.Models.CrossSections;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataAccess.DTOs
+{
+    public class CrossSectionDTO : ICrossSection
+    {
+        public ICrossSectionRepository SectionRepository { get; }
+
+        public Guid Id { get; set; }
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}