what is the best way to remove a program?

[Mark Hartkemeyer]

I was installing the mysql51-server port and I had a message that the
install could not proceed, because mysql50-client was already
installed.  I simply ran a "cd" and then a "make deinstall" in the
mysql50-client directory.  Is this is the best way to remove a
program?  Does it depend on how the program was added (compiled versus
prebuilt binary added with pkg_add -r)?  I've tried pkg_delete in the
past, but it seems to always complain about dependencies and not
actually remove the program.

Thanks,
Mark Hartkemeyer