Bug: System.DateTime.TryParse returns a inconsistent tuple (true, >"Invalid Date"<)

[funkr]

Description

If the returned date is invalid, than the boolean flag must be false.
Must have the same behavoir as on the interactive shell.

Repro code

open System

let validGermanDate = "31.10.2020" 
let invalidAmericanDate = "13/1/2020" 
//let d = invalidAmericanDate
let d = validGermanDate
let r, date = System.DateTime.TryParse d
if r then 
    printfn "Result: %b but the date is: %s -> this not good!" r (date.ToShortDateString ())
else 
    printfn "Result: %b than the date is: %s -> this is ok!" r (date.ToShortDateString ())

Expected and actual results

If TryParse gives back a true than the date must be usable.

On the interactive shell TryParse behaves correct!

Related information

Reproducible on REPL with the given code.

[Zaid-Ajaj]

Please checkout this comment for a workaround which implements a small module to do the parsing