how do i download file of internet on ppc?

Hi there~
I want to write a programe about download file with C#, and maybe the file at everywhere.
I found two methods to download file of internet.
(webclient and DiscoveryClientProtocol.Download)
But,it can't use for PPC paltform.
Have someone know how to download file of internet
Please tell or supply idea to me.

By kuan chu