GDI+ 默认DPI和ClientSize是多少？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using PrintableForm_chen;

namespace HundredPixelsSquare_chen
{
    class HundredPixelsSquare:PrintableForm
    {
        static void Main(string[] args)
        {
            Application.Run(new HundredPixelsSquare());
        }
        public HundredPixelsSquare()
        {
            Text = "Hundred Pixels Square!";
        }
        protected override void DoPage(Graphics grfx, Color clr, int cx, int cy)
        {
            grfx.FillRectangle(new SolidBrush(clr),100,100,100,100);
            Console.WriteLine("grfx.dpix is {0}",grfx.DpiX);
            Console.WriteLine("grfx.dpiy is {0}",grfx.DpiY);
            Console.WriteLine("clientsize is {0}",ClientSize);
        }
    }
}