Unicode – F # – card is not suitable for display in the console

let suitSymbol = function
 | Spades -> "\u2660"
 | Clubs -> "\u2663"
 | Diamonds -> "\ u2666"
 | Hearts -> "\u2665"

printf "%s" <| suitSymbol Spades

chcp 65001 
Every time I want to run my game.
 
After studying the method of referencing DLL in F#, I came up with the following solution:
 
 
module Kernel =
 []
 extern bool SetConsoleOutputCP(uint32 wCodePageID)
In the main function code I added

[]
let main args =
 Kernel.SetConsoleOutputCP 65001u |> ignore
 
It only modifies the code page of this process, so other applications will run normally.
 

chcp 65001

I am making a console-based card game with f#, and I am trying to use unicode chars Show card suits. Mapping suit-to-char represents the following function:

let suitSymbol = function
 | Spades -> "\u2660"
 | Clubs -> "\u2663"
 | Diamonds -> "\u2666"
 | Hearts -> "\u2665"

Show this usage

printf "%s" <| suitSymbol Spades
 
It works fine in fsi:
 

but When compiled with fsc.exe, it will display different (unsuitable) characters:
 
 
I have tried to change the encoding of the source file, but it has no effect. Is there a way to make it work at compile time? 
 
Edit (30.01.2017):
Stuart's anwser is correct, but I can’t understand it, it needs to be entered
 
 
chcp 65001 
Every time I want to run my game.
 
After studying the method of referencing DLL in F#, I came up with the following solution:
 
 
module Kernel =
 []
 extern bool SetConsoleOutputCP(uint32 wCodePageID)
In the main function code I added

[]
let main args =
 Kernel.SetConsoleOutputCP 65001u |> ignore
 
It only modifies the code page of this process, so other applications will run normally.
At the command prompt, you need to change the code page , As follows: 
 
 
chcp 65001
After some tests, I was able to reproduce your problem and solve it. Credit to @s952163