c# - Calculating info_hash from UrlEncoded query string -

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Actually, I'm making a small tracker for experimental purposes, I've got quite far away, and now on the announcement part I am working.

I do not know exactly how I should define the information_hash query string.

Specification, this is an urlencoded 20-byte SHA1 hash , which has written this code to me, 

  byte [] foo = encoding .Default.GetBytes (HttpUtility UrlDecode (infoHash)); String temp = ""; Forrest (Byte B in AFU) {temp + = b.ToString ("X"); }

which gives the following value to 'temporary', 

  5D3F3F3F3F5E3F3F3F153FE4033683F55693468

The first and last few letters are correct. This is raw information, 

 % 5d% 96% b6% f6% 84% 5e% ea% da% c5% 15% c4% 0e% 403h% b9Ui4h

And this is what both uTorrent and my own tracker gives me information as a file when it is generated from the torrent file, 

  5D96B6F6845EEADAC515C40E403368B955693468

What am I doing wrong?

The URL code returns a string, but if the SHA1 hash does not understand the (ANSI) string in the form of.
Without roundtrip for string, you want to decode the input string directly into a byte array. 

 code

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