/// <summary>Free the resource.</summary>
public void Unload()
{
if (_display != IntPtr.Zero && _fontResourceId != (X11.XID) 0)
{
if (!_useFontset && _fontResourceId != (X11.XID) 0)
{
X11lib.XUnloadFont(_display, _fontResourceId);
}
else if (_useFontset && _fontResourceId != (X11.XID) 0)
{
X11lib.XFreeFontSet(_display, _fontResourceId);
}
_display = IntPtr.Zero;
_fontResourceId = (X11.XID) 0;
}
}