What is the best security option in crypography?

Question

In the cryptography which one is the beat security option MD5 or SHA-1.what the difference between them?

Answer 1

These links are checked by me . They are say uninstall Silver light SDK 2 but i am use silverlight SDK 3.
But here no solved any forum at last problem still end of discussion on forum.
i check it on asp.net forum and silver light site

Answer 2

 check the links