Library material was added

StructureHelperCommon/Infrastructures/Exceptions/StructureHelperException.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Infrastructures.Exceptions
+{
+    public class StructureHelperException : Exception
+    {
+        public StructureHelperException(string errorString) : base(errorString)
+        {
+        }
+    }
+}