I am always amazed by the capability of Xamarin.Forms Custom Renderer. I wanted to try something and thought of extending the Entry Custom Renderer for Windows Phone App initially to try and provide Corner Radius for Textbox.

If you are a Windows Phone developer, then you already know the complexities. Generally, the TextBox element in Windows Phone, doesn’t have the property of CornerRadius. Corner Radius, generally provides the Curved borders, which in this case would provide for the Textbox control. Anyways, in order to provide a separate border, we generally have to nest the TextBox inside a Border element to provide the Corner Radius.

<Border Margin="5" Padding="5" BorderThickness="1" BorderBrush="Red" Background="AntiqueWhite" CornerRadius="10">
    <TextBlock Text="Lorem ipsum"/>
</Border>

Now I have tried to achieve somewhat same in Xamarin.Forms using Custom Renderers for Windows Phone.
The code is currently checked-in here.

Happy Coding!