请问这个是怎么回事，c#连sqlserver调试的时候报错，方法类里

有人吗，wuwuwu

百度一大把，百度一大把，百度一大把
 private static string connectionString="Data Source=127.0.0.1;Database=MyDB;UID=sa;pwd=123456;";
 /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="sqlString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string sqlString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(sqlString, connection))
                {
                    try
                    {
                        connection.Open();
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (SqlException ex)
                    {
                        connection.Close();
                        return 0;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }