C# (KULLANICI ADI VE ŞİFRE İLE FORMLAR ARASI GEÇİŞ)

using System; //FORM-1
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
       
            Form2 dgrfrm = new Form2();
        private void button1_Click(object sender, EventArgs e)
        {
            if(textBox1.Text=="Admin" && textBox2.Text=="gkhan496")
            {
                dgrfrm.Show();  
            }
        }
    }
}
FORM-2
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication4
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
           
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form1 frm1 = new Form1();
            frm1.Show();
        }
    }
}