How to use Task.WhenAny and implement retry

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I believe it would be easier to retry within the tasks, and then replace the Task.WhenAny-in-a-loop antipattern with Task.WhenAll

E.g., using Polly:

var tasks = new List<Task<MyType>>();
var policy = ...; // See Polly documentation
foreach(var item in someCollection)
  tasks.Add(policy.ExecuteAsync(() => GetSomethingAsync()));
await Task.WhenAll(tasks);

or, more succinctly:

var policy = ...; // See Polly documentation
var tasks = someCollection.Select(item => policy.ExecuteAsync(() => GetSomethingAsync()));
await Task.WhenAll(tasks);

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