nonascii characters in filename doesn't work in Unity

[choigawoon]

In .Net 8.0, works perfectly. but not in Unity.

here's my reproduction sample.
https://github.com/choigawoon/test-unity-synology-api

open Assets/Scens/TestScene and click play after inserting infos.

---

Something`s broken when doing this code.

headerValue = bytes.Aggregate("", (current, b) => current + (char) b);

In .Net 8.0

headerValue:
"form-data; name="file"; filename="ìµ\u009cê°\u0080ì\u009a´_H2_RIGHT_STAGE 2 - 2_20231220_234457_640x360.mp4"; filename*=UTF-8''%EC%B5%9C%EA%B0%80%EC%9A%B4_H2_RIGHT_STAGE%202%20-%202_20231220_234457_640x360.mp4"

In Unity

headerValue:
"form-data; name="file"; filename="���_H2_RIGHT_STAGE 2 - 2_20231220_234457_640x360.mp4"; filename*=UTF-8''%EC%B5%9C%EA%B0%80%EC%9A%B4_H2_RIGHT_STAGE%202%20-%202_20231220_234457_640x360.mp4"

[choigawoon]

In Net8.0
(char)b convert to unicode when b is 156,

"form-data; name="file"; filename="ìµ\u009c"
(char)b = 156 '\u009c' |char|

In unity,
"form-data; name="file"; filename="�"
(char)b = '�' |char|

i have no idea from here. how to fix it?

[plneto]

I'm not familiar with Unity. Is it possible to reproduce the issue using a regular .NET project?

One thing you could try is to download this project and reference it directly in your Unity project. That way it will be easier to debug the code and fix the errors. It would be great if you could try it.

[choigawoon]

it works in regular .NET project as i mentioned. ( .NET 8.0 )
i would have to ask to unity community about this.