public void SaveFile()
        {
            if (Data.Count > 0)
            {
                var excelApp = new Excel.Application();

                excelApp.Visible = false;

                excelApp.DisplayAlerts = false;

                excelApp.Workbooks.Add();

                Excel._Worksheet workSheet = (Excel.Worksheet)excelApp.ActiveSheet;

                GenerateHeaderLine(workSheet);

                int line = 2;

                foreach (T item in Data)
                {
                    for (int i = 0, j = Headers.Count; i < j; i++)
                    {
                        object value = item.GetType().GetProperty(Headers[i]).GetValue(item, null);

                        if (value == null)
                        {
                            value = "";
                        }

                        int s = 65 + i;

                        char c = (char)s;

                        workSheet.Cells[line, c.ToString()] = value.ToString();
                    }

                    line++;
                }

                string fullPath = Path.Combine(Dir, FileName);

                if (File.Exists(fullPath))
                {
                    File.Delete(fullPath);
                }

                excelApp.ActiveWorkbook.SaveCopyAs(fullPath);

                excelApp.ActiveWorkbook.Close();

                excelApp.Quit();

                excelApp = null;

                System.Diagnostics.Process.GetProcessesByName("EXCEL").ToList().ForEach((x) =>
                {
                    x.Kill();
                });
            }
        }