c# Winform Login

Create Form : LoginForm , MainForm
Program.cs

static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            LoginFrm loginFrm = new LoginFrm();
            if (loginFrm.ShowDialog() == DialogResult.OK)
            {
                Application.Run(new MainFrm());
            }
        }
    }

LoginForm.cs

private void button1_Click(object sender, EventArgs e)
        {
            //Login Check

            this.DialogResult = DialogResult.OK;
        }


Other:
1.LoginForm property  "FormBorderStyle" :None ; "StartPosition":centerscreen
          AcceptButton : LoginButton;CancelButton:CancelButton