Уххх, школьники!

WinAPI в помощь. https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-setwindowpos

IntPtr handle = process.MainWindowHandle;

if (handle != IntPtr.Zero)

{

double radius = 70.0; int centerx = 960, centery = 540;

for(int angle = 0; angle < 720; angle++)

   SetWindowPos(handle, (int)(centerx + radius*Mathf.cos((pi*angle)/320.0)), (int)(centery + radius*Mathf.sin((pi*angle)/320.0)), 0, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_SHOWWINDOW);

}