Can this LinQ statement made run multi threading - using more cpu cores

Question

I have written the below linq statement. But it takes huge time to process since there are so many lines. My cpu has 8 cores but only using 1 core due to running single thread.

Answer 1

The following snippet can perform that operation using the Parallel Tasks Library's Parallel.ForEach method. The snippet below takes each line in the 'all-lines' file you have, splits it on spaces, and then searches each line for banned words. The Parallel-ForEach should use all available core's on your machine's processor. Hope this helps.

System.Threading.Tasks.Parallel.ForEach(
    lstAllLines,
    line =>
    {
        var wordsInLine = line.ToLowerInvariant().Split(' ');
        var bannedWords = lstBannedWords.All(bannedWord => wordsInLine.Contains(bannedWord));
        // TODO: Add the banned word(s) in the line to a master list of banned words found.
    });