Hello,
this code is not working now, i guess facebook has made some changes
please check and advice
https://www.aspsnippets.com/DownloadFile.aspx?File=ee7ebdd6-bc69-4cee-ab61-a059f18e8e65.zip#center
{
"error": {
"message": "URL \u0644\u0648\u0688 \u0646\u06c1\u06cc\u06ba \u06a9\u06cc\u0627 \u062c\u0627 \u0633\u06a9\u062a\u0627: \u0627\u0633 URL \u06a9\u06cc \u0688\u0648\u0645\u06cc\u0646 \u0627\u06cc\u067e \u06a9\u06cc \u0688\u0648\u0645\u06cc\u0646\u0632 \u0645\u06cc\u06ba \u0634\u0627\u0645\u0644 \u0646\u06c1\u06cc\u06ba \u06c1\u06d2\u06d4 \u06cc\u06c1 URL \u0644\u0648\u0688 \u06a9\u0631\u0646\u06d2 \u06a9\u0627 \u0627\u06c1\u0644 \u06c1\u0648\u0646\u06d2 \u06a9\u06cc\u0644\u0626\u06d2\u060c \u0627\u067e\u0646\u06cc \u0627\u06cc\u067e \u06a9\u06cc \u062a\u0645\u0627\u0645 \u0688\u0648\u0645\u06cc\u0646\u0632 \u0627\u0648\u0631 \u0630\u06cc\u0644\u06cc \u0688\u0648\u0645\u06cc\u0646\u0632 \u06a9\u0648 \u0627\u067e\u0646\u06cc \u0627\u06cc\u067e \u06a9\u06cc \u0633\u06cc\u0679\u0646\u06af\u0632 \u06a9\u06cc \u0627\u06cc\u067e \u0688\u0648\u0645\u06cc\u0646\u0632 \u0641\u06cc\u0644\u0688 \u0645\u06cc\u06ba \u0634\u0627\u0645\u0644 \u06a9\u0631\u06cc\u06ba\u06d4",
"type": "OAuthException",
"code": 191,
"fbtrace_id": "A9fKz7xh4xpOaJKAYoUeCZ8"
}
}