GUI Windows Form C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
public class Form1 : Form
{
      private System.Windows.Forms.MenuStrip menuStrip1;
      private System.Windows.Forms.ToolStripMenuItem fileToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem newToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem exitToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem child1ToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem windowToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem cascadeToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem tileHorizontalToolStripMenuItem;
      private System.Windows.Forms.ToolStripMenuItem tileVerticalToolStripMenuItem;
      private System.Windows.Forms.ToolStripSeparator toolStripSeparator1;
      
      public Form1() {
        InitializeComponent();
      }
      private void child1ToolStripMenuItem_Click(object sender, EventArgs e ){
        ChildForm formChild = new ChildForm("Child", "winter.jpg" );
        formChild.MdiParent = this;
        formChild.Show();
     }
     private void cascadeToolStripMenuItem_Click(object sender, EventArgs e ) {
       this.LayoutMdi( MdiLayout.Cascade );
     } 
     private void tileHorizontalToolStripMenuItem_Click(object sender, EventArgs e ) {
       this.LayoutMdi( MdiLayout.TileHorizontal );
     }
     private void tileVerticalToolStripMenuItem_Click(object sender, EventArgs e ) {
       this.LayoutMdi( MdiLayout.TileVertical );
     }
     private void InitializeComponent() {
         this.menuStrip1 = new System.Windows.Forms.MenuStrip();
         this.fileToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.newToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.child1ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.exitToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.windowToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.cascadeToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.tileHorizontalToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.tileVerticalToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
         this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
         this.menuStrip1.SuspendLayout();
         this.SuspendLayout();
         // 
         // menuStrip1
         // 
         this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.fileToolStripMenuItem,
            this.windowToolStripMenuItem});
         this.menuStrip1.Location = new System.Drawing.Point(0, 0);
         this.menuStrip1.MdiWindowListItem = this.windowToolStripMenuItem;
         this.menuStrip1.Name = "menuStrip1";
         this.menuStrip1.Size = new System.Drawing.Size(353, 24);
         this.menuStrip1.TabIndex = 1;
         this.menuStrip1.Text = "menuStrip1";
         // 
         // fileToolStripMenuItem
         // 
         this.fileToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.newToolStripMenuItem,
            this.exitToolStripMenuItem});
         this.fileToolStripMenuItem.Name = "fileToolStripMenuItem";
         this.fileToolStripMenuItem.Text = "File";
         // 
         // newToolStripMenuItem
         // 
         this.newToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.child1ToolStripMenuItem});
         this.newToolStripMenuItem.Name = "newToolStripMenuItem";
         this.newToolStripMenuItem.Text = "New";
         // 
         // child1ToolStripMenuItem
         // 
         this.child1ToolStripMenuItem.Name = "child1ToolStripMenuItem";
         this.child1ToolStripMenuItem.Text = "Child1";
         this.child1ToolStripMenuItem.Click += new System.EventHandler(this.child1ToolStripMenuItem_Click);
         // 
         // exitToolStripMenuItem
         // 
         this.exitToolStripMenuItem.Name = "exitToolStripMenuItem";
         this.exitToolStripMenuItem.Text = "Exit";
         // 
         // windowToolStripMenuItem
         // 
         this.windowToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.cascadeToolStripMenuItem,
            this.tileHorizontalToolStripMenuItem,
            this.tileVerticalToolStripMenuItem,
            this.toolStripSeparator1});
         this.windowToolStripMenuItem.Name = "windowToolStripMenuItem";
         this.windowToolStripMenuItem.Text = "Window";
         // 
         // cascadeToolStripMenuItem
         // 
         this.cascadeToolStripMenuItem.Name = "cascadeToolStripMenuItem";
         this.cascadeToolStripMenuItem.Text = "Cascade";
         this.cascadeToolStripMenuItem.Click += new System.EventHandler(this.cascadeToolStripMenuItem_Click);
         // 
         // tileHorizontalToolStripMenuItem
         // 
         this.tileHorizontalToolStripMenuItem.Name = "tileHorizontalToolStripMenuItem";
         this.tileHorizontalToolStripMenuItem.Text = "Tile Horizontal";
         this.tileHorizontalToolStripMenuItem.Click += new System.EventHandler(this.tileHorizontalToolStripMenuItem_Click);
         // 
         // tileVerticalToolStripMenuItem
         // 
         this.tileVerticalToolStripMenuItem.Name = "tileVerticalToolStripMenuItem";
         this.tileVerticalToolStripMenuItem.Text = "Tile Vertical";
         this.tileVerticalToolStripMenuItem.Click += new System.EventHandler(this.tileVerticalToolStripMenuItem_Click);
         // 
         // toolStripSeparator1
         // 
         this.toolStripSeparator1.Name = "toolStripSeparator1";
         // 
         // UsingMDIForm
         // 
         this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
         this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
         this.ClientSize = new System.Drawing.Size(353, 310);
         this.Controls.Add(this.menuStrip1);
         this.IsMdiContainer = true;
         this.MainMenuStrip = this.menuStrip1;
         this.Name = "UsingMDIForm";
         this.Text = "UsingMDI";
         this.menuStrip1.ResumeLayout(false);
         this.ResumeLayout(false);
         this.PerformLayout();
      }
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}
public class ChildForm : Form
{
   private System.Windows.Forms.PictureBox picDisplay;
   
   public ChildForm( string title, string fileName )
   {
      InitializeComponent();
      Text = title; 
      picDisplay.Image = Image.FromFile(fileName);
   }
   
   private void InitializeComponent() {
         this.picDisplay = new System.Windows.Forms.PictureBox();
         ((System.ComponentModel.ISupportInitialize)(this.picDisplay)).BeginInit();
         this.SuspendLayout();
         // 
         // picDisplay
         // 
         this.picDisplay.Location = new System.Drawing.Point(1, 7);
         this.picDisplay.Name = "picDisplay";
         this.picDisplay.Size = new System.Drawing.Size(225, 247);
         this.picDisplay.TabIndex = 0;
         this.picDisplay.TabStop = false;
         // 
         // ChildForm
         // 
         this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
         this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
         this.ClientSize = new System.Drawing.Size(227, 256);
         this.Controls.Add(this.picDisplay);
         this.Name = "ChildForm";
         this.Text = "Child";
         ((System.ComponentModel.ISupportInitialize)(this.picDisplay)).EndInit();
         this.ResumeLayout(false);
      }
}