Is it possible to get successful results from a Task.WhenAll when one of the tasks fails?

Question

Given the following:

var tPass1 = Task.FromResult(1);
var tFail1 = Task.FromException(new ArgumentException(\"fail1\"));
var tFail2 = Task.FromExc         


        

Answer 1

Maybe

public async Task RejectFailedFrom(params Task[] tasks)
{
    try
    {
        await Task.WhenAll(tasks);
    }
    catch(Exception exception)
    {
        // Handle failed tasks maybe
    }

    return tasks.Where(task => task.Status == TaskStatus.RanToCompletion).ToArray();
}

Usage

var tasks = new[]
{
    Task.FromResult(1),
    Task.FromException(new ArgumentException("fail1")),
    Task.FromException(new ArgumentException("fail2"))
};

var succeed = await RejectFailedFrom(tasks);
// [ tasks[0] ]