Explanation about the error:
public void DownloadFileAsync(
Uri address,
string fileName
)
It doesn’t return anything (void) and you are passing this to listsext! Ofcourse you will get an Exception
:
Cannot implicitly convert type ‘void’ to ‘string’
What you want to achieve: (my guess, not much information given)
You want to have the filename, you don’t need to download it.
Uri u = new Uri("http://rotter.net/scoopscache.html")
filename = Path.GetFileName(u.LocalPath);
See here: Get file name from URI string in C#
2
solved How To Download HTML File Name As A String?