Add new strrrups DTOs

StructureHelperCommon/Services/IInterpolateValueLogic.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Services
+{
+    public interface IInterpolateValueLogic
+    {
+        double X1 { get; set; }
+        double Y1 { get; set; }
+        double X2 { get; set; }
+        double Y2 { get; set; }
+        double KnownValueX  { get; set; }
+        double GetValueY();
+    }
+}