/// <summary>
/// The method creats xml file with all products, save it on server and returns it to client
/// </summary>
/// <returns>The XML file with all products</returns>
public FileResult ExportToXML()
{
TransferData export = new TransferData();
string filePath = Server.MapPath("~/Content/documents/Catalog.xml");
string fileType = "xml";
string fileName = "Catalog.xml";
export.ExportToXML(productService.GetAllElements(), filePath);
return(File(filePath, fileType, fileName));
}