How to make a form's size to fill all screen at design time?

Question

How can I make a form fill all the screen (in terms of size) when clicked (not fullscreen like f11). At design - time (Not on code behind)?

Answer 1

At design time: use the WindowsState property defined to Maximized.

At runtime without using this property: you can use this:

static public class FormHelper
{
  static public void SetSizeToScreen(this Form form)
  {
    int left = Screen.PrimaryScreen.Bounds.Left;
    int top = Screen.PrimaryScreen.Bounds.Top;
    int width = Screen.PrimaryScreen.Bounds.Width;
    int height = Screen.PrimaryScreen.Bounds.Height;
    form.Location = new Point(left, top);
    form.Size = new Size(width, height);
  }

  static public void SetSizeToDesktop(this Form form)
  {
    int left = SystemInformation.WorkingArea.Left;
    int top = SystemInformation.WorkingArea.Top;
    int width = SystemInformation.WorkingArea.Width;
    int height = SystemInformation.WorkingArea.Height;
    form.Location = new Point(left, top);
    form.Size = new Size(width, height);
  }
}

Usage:

this.SetSizeToDesktop();