How to obtain one-way hash for given string in .NET?

Is there a build in library in .NET that can compute secure one-way hash ? I mean a library that implements SHA-2 cryptographic hash function or something similar.

If is there is no SHA-2 implementation some weaker hash funcion would be sufficient. If there are more options I prefer the most secure one.

Please provide a use example e.g. provide the code that returns one-way hash for string mySampleString.

EDIT: Please provide the example and the hash algorithm used.开发者_运维百科

You can use the SHA256Mananged class to generate a hash of a string. The ComputeHash documentation provides a complete example.

If you are targeting Vista+ only, you can use the faster SHA256Cng class instead. Just realize that it will throw on XP.

Have a look in the System.Security.Cryptography namespace.
There you have a bunch of SHA-algorithms, MD5 etc.

HashAlgorithm.ComputeHash Method (Byte[])