How To Derive from an AsyncInit Base Class

Determine the types of the initialization arguments (if any), e.g. IProgress<long>.

Import the AsyncInit namespace:

using Ditto.AsyncInit;

Derive from the corresponding AsyncInitBase or CancelableAsyncInitBase(recommended), specifying your class as the first generic type argument:

class UniversalAnswerService : CancelableAsyncInitBase<UniversalAnswerService, IProgress<long>>
{
    public int Answer { get; private set; }
}

Implement a private parameterless constructor, passing null as parameter to base:

private UniversalAnswerService()
: base(null)
{
}

Override InitAsync():

protected override async Task InitAsync(IProgress<long> progress, CancellationToken cancellationToken)
{
    await Task.Delay(TimeSpan.FromDays(7500000 * 365.25), cancellationToken);
    Answer = 42;
}