public List<string> GetExcelSheetNames(string excelFileFullPath, bool isIncludeName)
        {
            var fileType = Path.GetExtension(excelFileFullPath.ToLower()).Trim();
            var excelVersionNumber = fileType == ".xlsx" ? "12.0" : "8.0";

            OleDbConnection objConn = null;
            DataTable dt = null;
            var sheetList = new List<string>();
            
            try
            {
                var connString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0} ;Extended Properties=\"Excel {1};HDR=Yes;IMEX=2;\"", excelFileFullPath, excelVersionNumber);
                
                objConn = new OleDbConnection(connString);
                objConn.Open();
                dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

                if (dt == null)
                {
                    return sheetList;
                }

                foreach (DataRow row in dt.Rows)
                {
                    var sheetName = row["TABLE_NAME "].ToString();
                    if(isIncludeName)
                    {
                        sheetList.Add(sheetName);
                        continue;
                    }
                    else
                    {
                        if (sheetName.EndsWith("$"))
                        {
                            sheetList.Add(sheetName);
                        }
                    }
                }

                return sheetList;
            }
            finally
            {
                if (objConn != null)
                {
                    objConn.Close();
                    objConn.Dispose();
                }
                if (dt != null)
                {
                    dt.Dispose();
                }
            }
        }