База данных Строительство - вывести информацию в WebBrowser

public static class ConfigurationManager
    {var res = ConfigurationManager.ConnectionStrings[
                 "WindowsFormsApplication1.Properties.Settings.DatabaseConnectionString"];
            SqlCeEngine engine = new SqlCeEngine(res.ConnectionString);
            engine.Upgrade();
            //---------
    }

SqlCeEngine engine = new SqlCeEngine(res.ConnectionString);
            engine.Upgrade();

            var res = ConfigurationManager.ConnectionStrings[
                "WindowsFormsApplication1.Properties.Settings.DatabaseConnectionString"];
 
            using (var cn = new SqlConnection(res.ConnectionString))
            {

        private List<DbDataRecord> GetData(SqlCeCommand command)
        {
            List<DbDataRecord> records = new List<DbDataRecord>();
 
            SqlCeConnection connection = null;
            SqlCeDataReader dataReader = null;
            try
            {
                connection = new SqlCeConnection(ConnectionString);
                connection.Open();
                command.Connection = connection;
 
                dataReader = command.ExecuteReader();
                foreach (DbDataRecord rec in dataReader)
                    records.Add(rec);
            }
            finally
            {
                if (dataReader != null)
                    dataReader.Dispose();
                if (connection != null)
                    connection.Dispose();
                if (command != null)
                    command.Dispose();
            }
            return records;
        }
 
        private bool ChangeData(SqlCeCommand command)
        {
            SqlCeConnection connection = null;
            try
            {
                connection = new SqlCeConnection(ConnectionString);
                command.Connection = new SqlCeConnection(ConnectionString);
                if (connection.State == ConnectionState.Closed)
                    connection.Open();
                return command.ExecuteNonQuery() > 0;
            }
            catch
            {
                return false;
            }
            finally
            {
                if (connection != null)
                    connection.Dispose();
                if (command != null)
                    command.Dispose();
            }
        }

    public partial class Database
    {
        internal IEnumerable<FullEventInfo> GetAllLog()
        {
            return GetAllLogRecords().Select(ExtractEventInfo);
        }
 
        private FullEventInfo ExtractEventInfo(DbDataRecord record)
        {
            int id = (int)record["Id"];
            DateTime date = (DateTime)record["Date"];
            EventCode code = (EventCode)record["DescriptionId"];
            string description = (string)record["Description"];
            string additionalDescription = (string)record["AdditionalDescription"];
            return new FullEventInfo(code, (uint)id, date, description, additionalDescription);
        }
 
        private List<DbDataRecord> GetAllLogRecords()
        {
            SqlCeCommand command = new SqlCeCommand();
            command.CommandText =
                "SELECT Events.Id, Events.Date, Events.DescriptionId, EventDescriptions.Description, EventDescriptions.AdditionalDescription " +
                "FROM Events INNER JOIN EventDescriptions ON Events.DescriptionId = EventDescriptions.Id ORDER BY Events.Id";
            return GetData(command);
        }
    }

private void button7_Click(object sender, EventArgs e)
        {
            var ras = ConfigurationManager.ConnectionStrings["WindowsFormsApplication1.Properties.Settings.DatabaseConnectionString"];
            SqlConnection ThisConnection = new SqlConnection(ras.ConnectionString);
            ThisConnection.Open();
            SqlCommand thisCommand = ThisConnection.CreateCommand();
            thisCommand.CommandText = "select Заработная плата, Накладные расходы FROM Сотрудники where ID = 'ID' ";
            SqlDataReader thisReader = thisCommand.ExecuteReader();
            string res1 = string.Empty;
            while (thisReader.Read())
            {
                res1 += thisReader["Заработная плата"];
                res1 += thisReader["Накладные расходы"];
            }
            thisReader.Close();
            ThisConnection.Close();
            
            webBrowser1.DocumentText += " " + comboBox3.Text + res1 + "\r\n";
            //очищаем редактируемое поле
            comboBox3.Text = string.Empty;
        }