private void button1_Click(object sender, EventArgs e)
        {
            panel3.BackColor = Color.FromArgb(144, 144, 144);
            SqlConnection conn = new SqlConnection();
            conn.ConnectionString = @"Data Source=Desktop-D8FP0VA;Initial Catalog=cms;Integrated Security=True";
            conn.Open();
            SqlDataAdapter da;
            DataTable dt;
            using (da = new SqlDataAdapter
                ("select Username,Password from Admin where Password='" + password.Text + "' and Username ='" + textBox3.Text + "'", conn))
            {
                dt = new DataTable();
                da.Fill(dt);
            }
            if (dt.Rows.Count > 0)
            {
                this.Visible = false;
                Home h = new Home();
                h.Show();
            }
            else {
                MessageBox.Show("Invalid Username or Password");
            }
            conn.Close();
            textBox3.Text = "";
            password.Text = "";
        }