how can i get Excel's sheets name ? but the right names

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C#

im using this method to get Excel's sheets name , but some how it gives me wrong result .
some times strange names which there are not sheet with the same name .
some times gives me a sheet name twice .
whats wrong with it ?
do u have any other idea ?

thanks for your help .

public static List<string> GetSheetsNames(string path, ExcelVersion excelversion)
       {
           string connectionString;
           List<string> sheets = new List<string>();
           if (excelversion == ExcelVersion.Excel2003)
           {
               connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\";";
           }
           else
           {
               connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES\";";

           }
           DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
           DbConnection connection = factory.CreateConnection();
           connection.ConnectionString = connectionString;
           connection.Open();
           DataTable tbl = connection.GetSchema("Tables");
           connection.Close();
           foreach (DataRow row in tbl.Rows)
           {
               string sheetName = (string)row["TABLE_NAME"];
               if (sheetName.EndsWith("$"))
               {
                   sheetName = sheetName.Substring(0, sheetName.Length - 1);
               }
               sheets.Add(sheetName);
           }
           return sheets;
       }