How to get Excel column Header names

public static Dictionary<string,int> GetColumnMapping(Excel.Worksheet ExcelSheet, int HeaderRowIndex , List<string> Headers, Dictionary<string,int> HeaderMapping)
        {
            if (HeaderMapping != null)
                HeaderMapping.Clear();

            object misValue = System.Reflection.Missing.Value;

            Excel.Range HeaderRange = ExcelSheet.Rows[HeaderRowIndex , misValue];
            Excel.Range currentFind = null;

            foreach (string Header in Headers)
            {
                currentFind = HeaderRange.Find(Header, misValue, Excel.XlFindLookIn.xlValues, Excel.XlLookAt.xlPart, Excel.XlSearchOrder.xlByColumns, Excel.XlSearchDirection.xlNext, false, misValue, misValue);
                if(currentFind != null)
                    HeaderMapping.Add(Header, currentFind.Column);
            }

            return HeaderMapping;
        }

public List<String> getHeaderData(Sheet sheet) {
		List<String> headers = new ArrayList<>();
		Row row;
		int headerId = 0;
		if (sheet.getRow(headerId) != null && sheet.getRow(headerId).cellIterator() != null) {
			row = sheet.getRow(headerId);

			for (int h = 0; h <= row.getLastCellNum(); h++) {
				if (row.getCell((short) h) != null && row.getCell((short) h).toString().length() != 0) {
					headers.add(row.getCell((short) h).toString());
				}
			}

		}
		return headers;
	}