c# - Async.RunSynchronously() vs Async.StartAsTask().Result -


lets had f# computation deal in c# , wanted make them run synchronously. difference underneath hood between:

    public static t runsync<t>(fsharpasync<t> computation)     {         return fsharpasync.runsynchronously(computation,             timeout: fsharpoption<int>.none,             cancellationtoken: fsharpoption<system.threading.cancellationtoken>.none             );     }

or

    public static t runsync<t>(fsharpasync<t> computation)     {         return fsharpasync.startastask(computation,             taskcreationoptions: fsharpoption<taskcreationoptions>.none,             cancellationtoken: fsharpoption<system.threading.cancellationtoken>.none             ).result;     }

sorry if seems simple question, quite new async programming!

i think same - reed says, first 1 queues work directly while other 1 creates task, created task lightweight object (under cover, same , task created using taskcompletionsource - can see code here).

if in control of f# library, recommendation expose method returns task , hide f# async - make usage c# more convenient , avoid special f# types (like options). if have somework function in f#, write:

type nicecsharp =    static member somework() =     async.startastask(somework())   static member somework(cancellationtoken) =     async.startastask(somework(), cancellationtoken = cancellationtoken)

on c# side, see nice overloaded method returns task , works await. of course, can await result synchronously using result, overhead not big - , fact you're exposing nice c# api make easier integrate f# in system.


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