Get result from Task.WhenAll

Question

I have multiple tasks returning the same object type that I want to call using Task.WhenAll(new[]{t1,t2,t3}); and read the results.

When I try using <

Answer 1

Looks like you are using the overload of WaitAll() that doesn't return a value. If you make the following changes, it should work.

List<string>[] all = await Task.WhenAll(new Task<List<string>>[] { t, t2 })
                               .ConfigureAwait(false);

Answer 2

The return type of WhenAll is a task whose result type is an array of the individual tasks' result type, in your case Task<List<string>[]>

When used in an await expression, the task will be "unwrapped" into its result type, meaning that the type of your "all" variable should be List<string>[]