How can I fixed a form size in win application and not to let user changes its size?

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace adi.Windows

{

    public partial class Login : Form

    {

        public Login()

        {

            InitializeComponent();

            this.MaximumSize = new Size(300, 300);

            this.MinimumSize = new Size(300, 300);

        }

       

    }

}