C#MySQLConnection

CSharpMySQLConnection.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;

namespace LecturePractice
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("\n\n\t\t▶ "); string id = Console.ReadLine();
            Console.Write("\t\t▶ "); string password = Console.ReadLine();
            Console.Write("\t\t▶ "); string name = Console.ReadLine();

            String databaseConnect;
            MySqlConnection connect;

            databaseConnect = "Server=localhost;Database=bookmanage;Uid=study;Pwd=0000";
            connect = new MySqlConnection(databaseConnect);  // conncet MySQL

            connect.Open(); // open MySQL      

            String sql = "insert into member values('" + id + "', '" + password + "', '" + name + "');";

            MySqlCommand command = new MySqlCommand(sql, connect); // command
            if (command.ExecuteNonQuery() == 1)
            {
                Console.Clear();
                Console.WriteLine("\n\n\n\n");
                Console.WriteLine("\t\tInsert " + id);
                Thread.Sleep(1000);
            }
            else
            {
                Console.Clear();
                Console.WriteLine("Database Error!!");
                Thread.Sleep(1000);
            }

            sql = "select * from member;";
            command = new MySqlCommand(sql, connect);
            MySqlDataReader reader = command.ExecuteReader();

            while (reader.Read())
            {
                id = reader["id"].ToString();
                password = reader["pwd"].ToString();
                name = reader["name"].ToString();

                MemberVO member = new MemberVO(id, password, name);
                Console.WriteLine("\t\t" + member.PrintMember());
            }

            reader.Close();
            connect.Close();
        }
    }
}