Objects of NdmElement were added

DataAccess/DTOs/CirclePrimitiveDTO.cs

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+using StructureHelperLogics.NdmCalculations.Primitives;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataAccess.DTOs
+{
+    public class CirclePrimitiveDTO
+    {
+    }
+}

DataAccess/DTOs/NdmPrimitiveDTO.cs

@@ -0,0 +1,35 @@
+using Newtonsoft.Json;
+using StructureHelper.Models.Materials;
+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Models.Shapes;
+using StructureHelperLogics.NdmCalculations.Primitives;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataAccess.DTOs
+{
+    public class NdmPrimitiveDTO : INdmElement
+    {
+        [JsonProperty("Id")]
+        public Guid Id { get; set; }
+        [JsonProperty("Center")]
+        public IPoint2D Center { get; set; }
+        [JsonProperty("HeadMaterial")]
+        public IHeadMaterial? HeadMaterial { get; set; }
+        [JsonProperty("Triangulate")]
+        public bool Triangulate { get; set; }
+        [JsonProperty("UserPrestrain")]
+        public StrainTuple UsersPrestrain { get; } = new StrainTuple();
+        [JsonIgnore]
+        public StrainTuple AutoPrestrain => throw new NotImplementedException();
+
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}