Microsoft .NET security model

I am looking for informations about the security model of Microsoft .NET If you could explain me how it is design, or give me links to understand 开发者_如何学JAVAit, it would be very kind of you !

Thanks.

This is an older book but I still find it an excellent reference

.Net Security ( Jason Bock, Tom Fischer, Nathan Smith , Pete Stromquist )

I've heard good things about this one too: Programming .NET Security by Adam Freeman