Question

Is there a way to get the size at runtime ?

I need to display the usercontrol in a dialog and need to size the window accordingly

Since there are multiple usercontrols, looking for make it generic if possible !!

Answer 1

You can use SizeToContent

<Window x:Class="WindowSample.MainWindow"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            Title="WPF Window"
            SizeToContent="WidthAndHeight" >

This will make your window automatically resize itself to fit the preferred size of your window contents.