Code:
public void Read()
        {
            //Otvara konenciju
            OpenConn();
            //kreira select string
            String selectStr = String.Format("Select * from {0}",thisTable);
            using (SqlCommand cmd = new SqlCommand(selectStr, conn))
            {
                //izvrsava upit
                cmd.ExecuteNonQuery();  
            }
            //Zatvara konekciju
            CloseConn();
        }