how to terminate login page in asp.net using c# for 3 wrong password

static int intCounter = 0;
           intCounter = intCounter + 1;

            textBox1.Text = "";
            textBox2.Text = "";
            textBox2.Text = "*";

            if ((intCounter < 3))
            {
                if ((textBox2.Text == "password" && textBox2.Text == "User"))
                {
                    MessageBox.Show("User name and password are correct");
                }
                else
                {
                    str = Convert.ToString(3 - intCounter);
                    MessageBox.Show("User name or password incorrect! You have " + str + " tries left.");
                }
            }
            else
            {
                MessageBox.Show("User name or password incorrect! You have no attempts remaining and the system is locked.");
                Application.Exit();
            }