How to use C# Winforms in Web Browser

Firstly, sorry for my english,

I want use C# Win Forms the in Web Browser. I'll write C# purchasing project for a my customer. But this customer wanting use this project on web browser. (Like remote desktop). Project will run on my customer server and i want use on web browser too.

I had search little bit on internet. It have can be done with delphi. In my opinion it can be with C# too.

But how?