No WebClient Class in Xamarin Forms

I am after the C# WebClient Class in Xamarin.Forms

The Documentation for the class is here:

• System.Net.WebClient Class - Xamarin Forms
• System.Net.WebClient Class - MSDN

I have imported the System.Net Namespace as per the requirement, but it comes up as an unnecessary namespace.
The System.Net.WebClient namespace is not available.

Is there anything I am missing? - The class should come up in the intellisense right?