I am programming with Xamarin.Forms. I would like know how to only set the height request for a single platform, using `OnPlatform` in XAML? I want to keep the default value of `-1` if the platform is not referred.

I currently have the following code:

```xml
<ListView.HeightRequest>
    <OnPlatform x:TypeArguments="x:Double">
        <On Platform="WPF" Value="153" />
        <On Platform="Android" Value="-1" />
        <On Platform="iOS" Value="-1" />
        <On Platform="UWP" Value="-1" />
    </OnPlatform>
</ListView.HeightRequest>

```

I wish I only had to write something like:

```xml
<ListView.HeightRequest>
    <OnPlatform x:TypeArguments="x:Double">
        <On Platform="WPF" Value="153" />
    </OnPlatform>
</ListView.HeightRequest>

```

This doesn't work, is it possible?