ConcurrentBag - Add Multiple Items?

Question

Is there a way to add multiple items to ConcurrentBag all at once, instead of one at a time? I don\'t see an AddRange() method on ConcurrentBag, but there is a Concat(). How

Answer 1

(I know this is an old post, thought I'd add a little something).

Like others have said: yes, you need to add them one by one. In my case, I added a small extension method to make things a bit cleaner, but under the hood it does the same thing:

    public static void AddRange(this ConcurrentBag @this, IEnumerable toAdd)
    {
        foreach (var element in toAdd)
        {
            @this.Add(element);
        }
    }

And then:

    ConcurrentBag ccBag = new ConcurrentBag();
    var listOfThings = new List() { 1, 2, 4, 5, 6, 7, 8, 9 };
    ccBag.AddRange(listOfThings);

I also looked at using AsParallel to add within the extension method, but after running some tests on adding a list of strings of various sizes, it was consistantly slower to use AsParallel (as shown here) as opposed to the traditional for loop.

    public static void AddRange(this ConcurrentBag @this, IEnumerable toAdd)
    {
        toAdd.AsParallel().ForAll(t => @this.Add(t));
    }