[chessgod101]

giv, the problem is that the string is being encoded as unicode. In order to get the correct hash, you need to encode the string using ASCIIEncoding instead of UnicodeEncoding.
When the string is encoded as unicode, these are the bytes that get hashed:

67 00 69 00 76 00

When you hash it as an ASCII string, these bytes get hashed and yield the correct result:

67 69 76