public class MySqlZugriff
{

    private string MyConnStr = "Server=Srv;" +
                               "Database=myDb;" +
                               "User ID=myUser;" +
                               "Password=myPass;" +
                               "Pooling=false";

    private IDbConnection MyConn;
    private string MyCmdStr = "SELECT Wert FROM MyTabelle";
    string MyResult; 

    public void MyConnect()
    {
       MyConn = new MySqlConnection(MyConnStr);
       MyConn.Open();

       IDbCommand MyCmd = MyConn.CreateCommand();

       MyCmd.CommandText = MyCmdStr;
       IDataReader MyReader = MyCmd.ExecuteReader();

       while(MyReader.Read()) {
            
           MyResult = (string) MyReader["Wert"];
           Console.WriteLine("Der Wert ist: " + MyResult);
           
           MyReader.Read();
           MyConn.Close();
           MyCmd.Dispose();
    }
}