MySQL Connection C#

MySQL Connection For C#

  try
            {
                string myConnection = "datasource=db4free.net;Port=3306;username=username;password=password;database=database";
                MySqlConnection MyConn = new MySqlConnection(myConnection);

                MySqlCommand SelectCommand = new MySqlCommand("SELECT * From Public WHERE Username='" + this.UsernameTextBox.Text + "' AND Password='" + this.PasswordTextBox.Text + "' ;", MyConn); //+ "' AND HWID='" + "PUBLIC" + "';");

                MySqlDataReader myReader;
                MyConn.Open();
                myReader = SelectCommand.ExecuteReader();
                int count = 0;
                while (myReader.Read())
                {
                    count = count + 1; //checks for duplicate users
                }
                if (count == 1)
                {
                    MessageBox.Show("LOG ME THE FUCK IN NAQQUAA I PAID");
                }
                else if (count > 1)
                {
                    MessageBox.Show("Duplicate Username and password... Access denied");
                }
                else
                {
                    MessageBox.Show("Username/password is NOT Correct... Please try again");
                }
                MyConn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("SHIT..." + Environment.NewLine + ex.Message);
            }