How to get a WPF window's ClientSize?

In WinForms, Form had a ClientSize property (inherited from Control), which returns the size of its client area, i.e., the area inside the title bar and window borders.

I'm not seeing anything similar in WPF: there's no ClientSize, ClientWidth, ClientHeight, GetClientSize(), or anything else that I can think to guess the name of.

How do I go about getting the client size of a WPF Window?

Solution

One way you could do it is to take the top most child element, cast this.Content to its type, and call .RenderSize on it, which will give you its size.

<Window x:Class="XML_Reader.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="400" Width="600" WindowStyle="SingleBorderWindow">
    <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
    </Grid>
</Window>

((Grid)this.Content).RenderSize.Height
((Grid)this.Content).RenderSize.Width

edit:

as Trent said, ActualWidth and ActualHeight are also viable solutions. Basically easier methods of getting what I put above.