Class2.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Leaernify
{
    internal class Class1
    {
        SqlConnection con = new SqlConnection(@"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Learnify;Integrated Security=True;");
        SqlCommand cmd;

        public Class1()
        {
            getData();
        }

        public void getData()
        {
            try
            {
                con.Open();
                cmd = new SqlCommand("SELECT * FROM users", con);
                SqlDataReader reader = cmd.ExecuteReader();

                while (reader.Read())
                {
                    int id = reader.GetInt32(0);
                    string username = reader.GetString(1);
                    string email = reader.GetString(2);

                    Console.WriteLine($"ID: {id}, Username: {username}, Email: {email}");
                }

                reader.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("Terjadi kesalahan: " + ex.Message);
            }
            finally
            {
                con.Close();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }

}