Limit the number of parallel threads in C#

Question

I am writing a C# program to generate and upload a half million files via FTP. I want to process 4 files in parallel since the machine have 4 cores and the file generating t

Answer 1

Task Parallel Library is your friend here. See this link which describes what's available to you. Basically framework 4 comes with it which optimises these essentially background thread pooled threads to the number of processors on the running machine.

Perhaps something along the lines of:

ParallelOptions options = new ParallelOptions();

options.MaxDegreeOfParallelism = 4;

Then in your loop something like:

Parallel.Invoke(options,
 () => new WebClient().Upload("http://www.linqpad.net", "lp.html"),
 () => new WebClient().Upload("http://www.jaoo.dk", "jaoo.html"));