Window function material done

StructureHelperCommon/Infrastructures/Enums/FunctionPurpose.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Infrastructures.Enums
+{
+    public enum FunctionPurpose
+    {
+        StressStrain,
+        FireProtection
+    }
+}