How to determine when all task is completed

Question

here is sample code for starting multiple task

Task.Factory.StartNew(() =>
        {
            //foreach (KeyValuePair entry in dicLis         


        

Answer 1

if i start 10 task using Task.Factory.StartNew() so how do i notify after when 10 task will be finish

Three options:

• The blocking Task.WaitAll call, which only returns when all the given tasks have completed
• The async Task.WhenAll call, which returns a task which completes when all the given tasks have completed. (Introduced in .NET 4.5.)
• TaskFactory.ContinueWhenAll, which adds a continuation task which will run when all the given tasks have completed.