Interpolation View for calculation result was added

Windows/ViewModels/Forces/ForceTuplesViewModel.cs

@@ -0,0 +1,25 @@
+using StructureHelper.Properties;
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Windows.ViewModels.Forces
+{
+    public class ForceTuplesViewModel : CRUDViewModelBase<IDesignForceTuple>
+    {
+        public override void AddMethod(object parameter)
+        {
+            NewItem = new DesignForceTuple() { LimitState=LimitStates.ULS, CalcTerm=CalcTerms.ShortTerm};
+            base.AddMethod(parameter);
+        }
+
+        public ForceTuplesViewModel(List<IDesignForceTuple> collection) : base(collection)
+        {
+            
+        }
+    }
+}