The remote server returned an error: (400) Bad Request.

grant_type = authorization_code &
code = yk44kuxxqkzasak47frgagds &
redirect_uri = https: //grandtrade.ge/BattleNetAuth/Token&
client_id = 7arkdj2n2t6jj2z __________________&
client_secret = Ny5UKHd4zcF __________________

byte [] BinData = System.Text.Encoding.UTF8.GetBytes (data);
URI = https: //eu.battle.net/oauth/token
Request.ContentType = "application / x-www-form-urlencoded";
Request.Headers.Add ("Authorization", "Basic N2Fya2RqMm4ydDZqajJ6NWNqMnQzY2J6ZTNmOGp5eGY6Tnk1VUtIZDR6Y0ZwcHFTVXdqcnhlVTlNRTdmQVhybVk =");