conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=e:\\;Extended Properties=dBASE IV;User ID=;Password=;";
                conn.Open();
                OleDbCommand comm = conn.CreateCommand();
                comm.CommandText = @"SELECT NOMER, FEMGN, FEOBS, DATA, TIME FROM ANALIZ";
                dt.Load(comm.ExecuteReader());
                column = dt.Columns[0];
                row = dt.Rows[0];
                result = row[column].ToString();
                dataGridView1.DataSource = dt;

    var fromEncodind = Encoding.GetEncoding(866);//из какой кодировки
                var bytes = fromEncodind.GetBytes(o);
                var toEncoding = Encoding.UTF8;//в какую кодировку
              string  ans = toEncoding.GetString(bytes);