Hey, I am trying to calculate a SHA-1 Hash from a string, but when I calculate the string using php's sha1 function I get something different than when I try it in C#. I need C# to calculate the same string as PHP (since the string from php is calculated by a 3rd party that I cannot modify). How can I get C# to generate the same hash as PHP? Thanks!!! String = [email protected] C# Code (Generates d32954053ee93985f5c3ca2583145668bb7ade86) string encode = secretkey + email; UnicodeEncoding UE = new UnicodeEncoding(); byte[] HashValue, MessageBytes = UE.GetBytes(encode); SHA1Managed SHhash = new SHA1Managed(); string strHex = ""; HashValue = SHhash.ComputeHash(MessageBytes); foreach(byte b in HashValue) { strHex += String.Format("{0:x2}", b); } PHP Code (Generates a9410edeaf75222d7b576c1b23ca0a9af0dffa98) sha1();