How to update a UserControl size which will never come in to view (only be printed)

I create a Usercontrol in code which get's a Datacontext and than get printed but i need to refresh the Usercontrol so it get resized (Stretch to fit the Content) but i don't know how i should do this

my Code

var view = new DruckV();
view.DataContext = this;
// now i need to resize it

i tried

view.UpdateLayout();// width and height will remain by 0,0

than i can call my Printer

var printer = new Printer();

so how should i do this because i can't use

view.Arrange(new Rect(new Point(0, 0), UnknownSize));


If you use 3.5 .net framework you can create a container for the control and perform Measure/Arrange for infinity size (or if control has a dynamic dimensions that depends on container size - set maximum allowed size to the container):

var panel = new StackPanel();
//panel.MaxWidth = 100; //if you control has dynamic sizing
//panel.MaxHeight = 100;
var infinitySize = double.PositiveInfinity,double.PositiveInfinity;
panel.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
panel.Arrange(new Rect(0, 0, panel.DesiredSize.Width, panel.DesiredSize.Width));

Unfortunately on .net 4.x this solution doesn't worked for me and only way I have found to force update controls size is create new Window with container (same as described above) and show this window outside a display screen (set Window.Left =-1000;)

BTW: in case of rendering by invisible window, size of the rendering control can't be larger than monitors screen size, and to render huge controls you have to perform ScaleTransformon it.

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