How do I translate 8bit characters into 7bit characters? (i.e. Ü to U)

Question

I\'m looking for pseudocode, or sample code, to convert higher bit ascii characters (like, Ü which is extended ascii 154) into U (which is ascii 85).

My initial gues

Answer 1

There is an article on CodeProject that looks good.

Also the conversion using codepage 1251 take my interest (see other answer).

I don't like the conversion tables, since the number of characters in Unicode are that large you easily miss one.