var headers = request.Headers;
headers["User-Agent"] = UserAgent;
request.Headers = headers;
return CefReturnValue.Continue;
<Grid>
<Grid Margin="20">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Button Grid.Row="0">Test</Button>
<Button Grid.Row="1">Test</Button>
<Button Grid.Row="2">Test</Button>
</Grid>
<Line
X1="0" Y1="0"
X2="800" Y2="450"
Stroke="Black"
StrokeThickness="4"/>
</Grid>