C# How to know the size of file on a website

Question

I want to download a file on a website using C# and show its downloading percentage using progressBar. I know I can use the following code to get the size of a local file, but how can I know the size of file posted on a website?

FileInfo finfo = new FileInfo(strFilePath);
int length = (int)finfo.Length;

Answer 1

When you start the download, the server should send a Content-length header which will tell you how big the file is.

Answer 2

Take a look at this question http://stackoverflow.com/questions/122853/c-get-http-file-size