try this code
#region Using directives
using System;
using System.Data;
using System.Data.SqlClient;
#endregion
namespace testConnect1
{
class SqlTest1
{
static void Main()
{
string connectionString = "server=localhost;database=test;uid=denis;pwd=dhoctor";
SqlConnection mySqlConnection = new SqlConnection(connectionString);
string selectString = "SELECT field01, field02, field03 " + "FROM test ";
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.CommandText = selectString;
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
mySqlDataAdapter.SelectCommand = mySqlCommand;
DataSet myDataSet = new DataSet();
mySqlConnection.Open();
Console.WriteLine("Retrieving rows from the Test table");
string dataTableName = "Test";
mySqlDataAdapter.Fill(myDataSet, dataTableName);
DataTable myDataTable = myDataSet.Tables[dataTableName];
foreach (DataRow myDataRow in myDataTable.Rows)
{
Console.WriteLine("Field01 = " + myDataRow["field01"]);
Console.WriteLine("Field02 = " + myDataRow["field02"]);
Console.WriteLine("Field03 = " + myDataRow["field03"]);
}
mySqlConnection.Close();
}
}
}