The ToolStrip on top of my form is to small. I want to increase its
height. Simply setting the Height-property doesn't change the height,
though. So I tried to place the ToolStrip in a ToolStripPanel, that does
react to changes in its Height-property, and by setting the
Dock-property of the contained ToolStrip to DockStyle.Fill, I expected
the ToolStrip to fill the entire ToolStripPanel. Nope. See the code
below, it is ready to run.

Code Snippet

namespace Namespace1
{

 using System.Windows.Forms;

 class Form1:Form
 {

  public Form1()
  {
   Text="How to expand a ToolStrip?";
   ToolStripPanel toolstrippanel=new ToolStripPanel();
   ToolStrip toolstrip=new ToolStrip
   (
    new ToolStripButton[]
    {
     new ToolStripButton("One"),
     new ToolStripButton("Two"),
     new ToolStripButton("Three"),
    }
   );
   toolstrippanel.Height=89;
   toolstrippanel.Join(toolstrip);
   toolstrip.Height=89;           //does not work
   toolstrip.Dock=DockStyle.Fill; //does not work
   Controls.Add(toolstrippanel);
  }
 }

 static class Program
 {
  [System.STAThread]
  static void Main()
  {
   Application.EnableVisualStyles();
   Application.Run(new Form1());
  }
 }
}