Add import of polygon from dxf

StructureHelperCommon/Services/Exports/IFileIOnputData.cs

@@ -0,0 +1,9 @@
+namespace StructureHelperCommon.Services.Exports
+{
+    public interface IFileIOnputData
+    {
+        string FileName { get; set; }
+        string Filter { get; set; }
+        string Title { get; set; }
+    }
+}