Cannot create files on Android with Xamarin

Question

I have a Xamarin-Studio App for Android and I simply want to download files and save them locally. But when I try to create a file in the files folder I get an

Answer 1

Using Mono, I think must be the same as in Xamarin Studio.

var path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
File.Create(path + "newFile.png");