>>>Hi,

FormattedText ft = new FormattedText("Hello", CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
>>>new Typeface("Verdana"), 100, Brushes.Black);
>>>double d = ft.MinWidth;

Second line throws a ArgumentNullException. Stack trace shows MS.Internal.TextFormatterImp.VerifyTextFormattingArguments(.....) Value cannot be null. Parameter name: textSource. Works fine IF DrawingContext.DrawText(ft,0,0) is executed between the two lines.
>>>Anyone?
>>
>>That is really a weird one.
>>
>>What's even weirder... if I hover over and browse the properties for ft in vs... it doesn't throw the error.
>>
>>Thought it might be timing, but that wasn't it.
>>
>>I added an able to reproduce response to your bug report.
>
>Thx. I also notices the behaviour you mention - inspecting the value in the debugger doesn't throw the exception and shows a valid double.
> Guess we'll have to wait and see what MS say about this one :-{
>
>Update: Just see MS has replied - fixed in .NET4. No workaround though......
>
>Best,
>Viv

Glad to hear it will be fixed in .NET 4

I didn't have time to dig deeper... seems that inspecting the object would be a clue to a possible work around. I didn't have time to dig deaper into it though. Also wonder if it throws the error in a release version. Didn't have time to test that one either.