C# 4 and .NET 4

Creating a Windows forms application ❘ 1121
Notice the call to InitializeComponent(). InitializeComponent() is located in Form1.Designer.cs and
does pretty much what it describes, and that is to initialize any controls that might have been added to the form.
It also initializes the form properties. For this example, InitializeComponent() looks like the following:
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Text = "Form1";
}
As you can see, it is basic initialization code. This method is tied to the Designer in Visual Studio. When you
make changes to the form by using the Designer, the changes are reflected in InitializeComponent().
If you make any type of code change in InitializeComponent(), the next time you make a change
in the Designer, your changes will be lost. InitializeComponent() gets regenerated after each change in
the Designer. If you need to add additional initialization code for the form or controls and components
on the form, be sure to add it after InitializeComponent() is called. InitializeComponent()
is also responsible for instantiating the controls so any call that references a control prior to
InitializeComponent() will fail with a null reference exception.
To add a control or component to the form, press Ctrl+Alt+X or select Toolbox from the View menu in
Visual Studio .NET to display the Toolbox. Form1 should be in design mode. Right-click Form1.cs in
Solution Explorer and select View Designer from the context menu. Select the Button control, and drag it to
the form in the Designer. You can also double-click the control to add it to the form. Do the same with the
TextBox control.
Now that you have added a TextBox control and a Button control to the form, InitializeComponent()
expands to include the following code:
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(77, 137);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(67, 75);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(100, 20);
this.textBox1.TabIndex = 1;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 264);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();
}
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