public static SizeF MeasureString (string inString, Font font)
{
/*NSTextStorage textStorage = new NSTextStorage();
textStorage.
NSTextContainer textContainer = new NSTextContainer(size);
NSLayoutManager layoutManager = new NSLayoutManager();
*/
var tv = new NSText { Font = font.ToNsFont (), Value = inString };
tv.SizeToFit ();
return tv.Frame.Size;
}