小算盤進階版(未完成)

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        System.Windows.Forms.Button[] Buttons;
        System.Windows.Forms.TextBox[] TextBoxs;
        int Case, i;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            TextBoxs = new System.Windows.Forms.TextBox[1];
            TextBoxs[0] = new TextBox();
            this.Controls.Add(TextBoxs[0]);
            TextBoxs[0].Size = new Size(190, 10);
            TextBoxs[0].Location = new System.Drawing.Point(10, 60);
            TextBoxs[0].Enabled = false;
            Buttons = new System.Windows.Forms.Button[16];
            for (int i = 0; i < 16; ++i)
            {
                Buttons[i] = new Button();
                Buttons[i].Click += new System.EventHandler(Buttons_Click);
                Buttons[i].Size = new Size(40, 40);
                this.Controls.Add(Buttons[i]);
                if (i <= 3)
                    Buttons[i].Location = new System.Drawing.Point(10 + i * 50, 250);
                else if (i > 3 && i <= 7)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 4) * 50, 200);
                else if (i > 7 && i <= 11)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 8) * 50, 150);
                else if (i > 11 && i <= 15)
                    Buttons[i].Location = new System.Drawing.Point(10 + (i - 12) * 50, 100);
            }

            Buttons[0].Text = "0";
            Buttons[1].Text = "00";
            Buttons[2].Text = "=";
            Buttons[3].Text = "+";
            Buttons[4].Text = "1";
            Buttons[5].Text = "2";
            Buttons[6].Text = "3";
            Buttons[7].Text = "-";
            Buttons[8].Text = "4";
            Buttons[9].Text = "5";
            Buttons[10].Text = "6";
            Buttons[11].Text = "*";
            Buttons[12].Text = "7";
            Buttons[13].Text = "8";
            Buttons[14].Text = "9";
            Buttons[15].Text = "/";
        }
        public void Buttons_Click(object sender, EventArgs e)
        {
            Buttons[0].Click+=new EventHandler( Buttons0_Click) ;
            Buttons[4].Click += new EventHandler(Buttons4_Click);

        }
        public void Buttons0_Click(object sender, EventArgs e)
        {
            TextBoxs[0].Text+=0;
        }
        public void Buttons4_Click(object sender, EventArgs e)
        {
            TextBoxs[0].Text = TextBoxs[0].Text + "1";
        }

    }
}