Xamarin Forms convert Xaml to common resource style Yummy PancakeView - xaml

Question

I am trying to convert my properties of a pancake control into a style so all my pancake controls are styled the same. This is what my XAML looks like.
<yummy:PancakeView x:Name="pvMEssage" BackgroundColor="{DynamicResource ExceptionBackground}" CornerRadius="0,0,20,20" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
Padding="0,0,0,0" Margin="0,0,0,0">
<yummy:PancakeView.BackgroundGradientStops StartPoint="0,0" EndPoint="0,0">
<yummy:GradientStop Offset="0.1" Color="{DynamicResource ExceptionBackground}" />
</yummy:PancakeView.BackgroundGradientStops>
<yummy:PancakeView.Border>
<yummy:Border Color="White" Thickness="2" />
</yummy:PancakeView.Border>
I know how to use setter.value in a style but I cannot figure out how to put the backgroundgradientstops in the style.
I have this so far:
<Style x:Key="PancakeViewTop" TargetType="yummy:PancakeView">
<Setter Property="CornerRadius" Value="20,20,0,0" />
<Setter Property="HorizontalOptions" Value="FillAndExpand" />
<Setter Property="VerticalOptions" Value="FillAndExpand" />
<Setter Property="Padding" Value="0,0,0,0" />
<Setter Property="Margin" Value="0,0,0,0" />
<Setter Property="BackgroundGradientStartPoint" Value="0,0" />
<Setter Property="BackgroundGradientEndPoint" Value="0,0" />
<Setter Property="BackgroundGradientStops">
<Setter.Value>
<yummy:GradientStop Offset="0.1" Color="{DynamicResource ExceptionBackground}" />
</Setter.Value>
</Setter>
<Setter Property="Border">
<Setter.Value>
<yummy:Border Color="White" Thickness="2" />
</Setter.Value>
</Setter>
</Style>
but I get an error on these lines
<Setter Property="BackgroundGradientStops">
<Setter.Value>
that states "The specified value cannot be assigned. The following type was expected: "GradientStopCollection"

Answer 1

Try with:
<Setter Property="BackgroundGradientStops">
<Setter.Value>
<pancake:GradientStopCollection>
<pancake:GradientStop Offset="0.1" Color="{DynamicResource ExceptionBackground}"/>
<pancake:GradientStop Offset="0.5" Color="{DynamicResource OtherColor}"/>
</pancake:GradientStopCollection>
</Setter.Value>
</Setter>
Also you need to specify at least 2 colors (2 GradientStop) otherwise it will throw an exception
Java.Lang.IllegalArgumentException: 'needs >= 2 number of colors'
and it does not make sens a gradient with only one color.