public static void ThisTo<T>( List<T> source, string[] colums, Func<T, object[]> action, string savePath, string sheetName = "")

         {

             XSSFWorkbook xssfworkbook = new XSSFWorkbook();

             ISheet sheet = xssfworkbook.CreateSheet(sheetName);

             IRow row = sheet.CreateRow();

             for (int i = ; i < colums.Length; i++)

             {

                 ICell cell = row.CreateCell(i);

                 cell.SetCellValue(colums[i]);

             }

             for (int i = ; i < source.Count; i++)

             {

                     IRow row1 = sheet.CreateRow(i + );

                      int colIndex = ;

                      row1.Cells.AddRange(action(source[i]).Select(p =>

                      {

                         var colCell = row1.CreateCell(colIndex,CellType.String);

                         colCell.SetCellValue(p.ToString());

                         colIndex++;

                         return colCell;

                     }));

             }

             MemoryStream stream = new MemoryStream();

             xssfworkbook.Write(stream);

             var buf = stream.ToArray();

             using (FileStream fs = new FileStream(savePath, FileMode.Create, FileAccess.Write))

             {

                 fs.Write(buf, , buf.Length);

                 fs.Flush();

             }

         }

  ThisTo<NAMES>(a, new string[] { "Name","Gender"}, p =>

             {

                 return new object[] {

                   p.Name,

                   p.Gender

                 };

             }, @"D:\ABCD.xlsx", "");