Need alternate class for SHA512Managed() and HMACSHA512() under FIPS in 2.0, 3.5 .Net framework

Question

I need alternation for SHA512Managed, HMACSHA512 cryptography algorithm under FIPS mode compilation in 2.0, 3.5 framework version. How to achieve this under FIPS compliance

m_hashAlgorithm = new SHA512Managed();
m_hmacSha = new HMACSHA512();