Question

I am using the Facebook C# SDK to get data. I want to use parallel.foreach but cannot use it – instead, an error occurs:

Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type

So is there any way I can convert data retrieved to a list?

dynamic friends = app.Get("me/friends");   
Parallel.ForEach(friends.data, friendsData =>
    {
        Interlocked.Increment(ref infoCount);
        LoadFriends(friend, infoCount);
    });

Answer 1

If you can’t use a lambda expression, have you tried an anonymous method?

dynamic friends = app.Get("me/friends");   
    Parallel.ForEach(friends.data, delegate(dynamic friendsData)
       {
           Interlocked.Increment(ref infoCount);
           LoadFriends(friend, infoCount);

       });