Trace logger calls were adde in limit curve calculator

StructureHelperCommon/Models/Loggers/StringLoggerEntry.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Models.Loggers
+{
+    public class StringLoggerEntry : ITraceLoggerEntry
+    {
+        public DateTime TimeStamp { get;}
+        public string Message { get; set; }
+        public int Priority { get; set; }
+
+        public StringLoggerEntry()
+        {
+            TimeStamp = DateTime.Now;
+        }
+    }
+}