For hashing, there is a good implementation here which stores salt and hashed password in a single field
https://bitbucket.org/burningice/compositec1contrib.security/src/a8e80a145effc5fa7aa2935b40bf9ad058ecab31/Security/PasswordHash.cs?at=default
https://bitbucket.org/burningice/compositec1contrib.security/src/a8e80a145effc5fa7aa2935b40bf9ad058ecab31/Security/PasswordHash.cs?at=default