GUI Windows Forms C# Tutorial

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
    private System.Windows.Forms.MonthCalendar monthCalendar1;
    private System.Windows.Forms.Button button1;
    public Form1() {
        this.monthCalendar1 = new System.Windows.Forms.MonthCalendar();
        this.button1 = new System.Windows.Forms.Button();
        this.SuspendLayout();
        // 
        // monthCalendar1
        // 
        this.monthCalendar1.FirstDayOfWeek = System.Windows.Forms.Day.Thursday;
        this.monthCalendar1.Location = new System.Drawing.Point(16, 16);
        this.monthCalendar1.Name = "monthCalendar1";
        this.monthCalendar1.ShowTodayCircle = false;
        this.monthCalendar1.ShowWeekNumbers = true;
        this.monthCalendar1.TabIndex = 0;
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(48, 184);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(128, 23);
        this.button1.TabIndex = 1;
        this.button1.Text = "Selection Range";
        this.button1.Click += new System.EventHandler(this.button1_Click_1);
        // 
        // Form1
        // 
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(232, 213);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.button1,
                                                                      this.monthCalendar1});
        this.Text = "Calendar Control";
        this.Load += new System.EventHandler(this.Form1_Load);
        this.ResumeLayout(false);
    }
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    private void Form1_Load(object sender, System.EventArgs e) {
        string str = monthCalendar1.Text.ToString();
    }
    private void button1_Click(object sender, System.EventArgs e) {
    }
    private void button1_Click_1(object sender, System.EventArgs e) {
        SelectionRange sr = monthCalendar1.SelectionRange;
        DateTime st = sr.Start;
        DateTime se = sr.End;
        MessageBox.Show("RANGE START = " + st.ToString() + "\nRANGE END = " + se.ToString(), "Range Selection");
    }
}