C# - Seperate WebView-Controls for Cookies & Cache

I am developing an app in Visual Studio 2017 with C#. In my application are two WebView-Controls and sadly it seems like that they are sharing their cookies, also with the Internet Explorer.

So I want to seperate them: each WebView should handle it's own cookies and should have a different cache. In short: there should be absolutely no connection between them.

My question is, how to do that?

Thank you and have a nice day, Nicolas