Debugging my downloader

I have a downloader application in C# using .NET 2.0. For the most people it works well, but I saw that I have big error log from other people. The 99% of the exceptions are:

• Unable to connect to remote server
• The remote name could not be resolved
• Operation timed out

Can this be from a short timeout of my downloader or from a slower internet connection? Or it can be some internal thread error in my downloader (it's multipar开发者_如何学Ct/multithread).

It sounds like some of your users

• are behind a firewall or proxy, which is supported by their web browser but not by your downloader or
• simply have a terribly bad Internet connection.