else or return?

Question

Which one out of following two is best wrt to performance and standard practice. How does .NET internally handles these two code snippets?

Code1

If(r         


        

Answer 1

Here's some additional reading on the guard clause: http://www.c2.com/cgi/wiki?GuardClause

One term I did not see mentioned that I think is important -- the purpose of the guard clause is to increase readability. Single exit methods can tend toward "arrow" code (where nesting of statements makes an arrowhead).