System Windows Forms C# by API

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;
public class FormSizable : System.Windows.Forms.Form
{
    public FormSizable()
    {
        this.MaximizeBox = true;
        this.FormBorderStyle = FormBorderStyle.Sizable;
    }
    static void Main()
    {
        Application.Run(new FormSizable());
    }
}