The beta version of nFluent as just been released on nuget by T.Pierrain. For those who may be wondering, nFluent aims at bringing to the C# ecosystem all the benefits provided by the FEST assertions library.
It supports english like test assertions and rely on auto-completion to guide developer into the writing of tests.
Plus it provides explicit error messages, making test driven fast and fun!
PS: for transparency, please note that I contribute to this initiative.