Login.LoginForm.ThreadDoLogin C# (CSharp) Method

        public void ThreadDoLogin()
        {
            Thread.Sleep(1000);
            if (this.txt_userName.Text == "" || this.txt_pwd.Text == "")
            {
                checkBox1.Checked = false;
                return;
            }
            this.Invoke(delegateDologin);

        }
        private void LoginForm_Load(object sender, EventArgs e)