French Accented characters

French Accented characters

in c#,  I'm sending a json post to your api containing accented characters.  I've added the header content-type  application/json;charset=utf-8 but it it still not working.  It shows as "?" in the zoho CRM. 

This is quite an issue for us. I've read threads saying that this is an ongoing issue for years,  is this fixed now?

thank you,