Window of calcultion's property is added

StructureHelperLogics/Models/Calculations/CalculationProperties/ICalculationProperty.cs

@@ -0,0 +1,16 @@
+using LoaderCalculator.Data.Matrix;
+using StructureHelperLogics.Infrastructures.CommonEnums;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.Models.Calculations.CalculationProperties
+{
+    public interface ICalculationProperty
+    {
+        List<IForceCombination> ForceCombinations { get; set; }
+        LimitStates LimitState { get; set; }
+        CalcTerms CalcTerm { get; set; }
+        IIterationProperty IterationProperty {get;}
+    }
+}