Gets or sets the form's window state.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The value specified is outside the range of valid values.
Before a form is displayed, the WindowState property is always set to FormWindowState.Normal, regardless of its initial setting. This is reflected in the Height, Left, Top, and Width property settings. If a form is hidden after it has been shown, these properties reflect the previous state until the form is shown again, regardless of any changes made to the WindowState property.
Available since 1.1