How do I center a window onscreen in C#?

A single line:

this.Location = new Point((Screen.PrimaryScreen.WorkingArea.Width - this.Width) / 2,
                          (Screen.PrimaryScreen.WorkingArea.Height - this.Height) / 2);

  1. Using the Property window

    Select form → go to property window → select "start position" → select whatever the place you want.


  2. Programmatically

    Form form1 = new Form(); form1.StartPosition = FormStartPosition.CenterScreen; form1.ShowDialog();

    Note: Do not directly call Form.CenterToScreen() from your code. Read here.

In Windows Forms:

this.StartPosition = FormStartPosition.CenterScreen;


this.WindowStartupLocation = WindowStartupLocation.CenterScreen;

That's all you have to do...

Use Form.CenterToScreen() method.