1) Add a new C# project to the solution
2) Add a new assembly reference to the F# project
3) One of two (or is that three?) things:
a) did you name your F# module (a declaration at the top of the .fs file like
module MyFirstGreeting? If yes, you will reference the function from C# by it's fully qualified name:
b) do you have an unnamed F# module? If yes, it's assumed the name of the .fs file, most likely
Program, so you'll need to invoke the function by calling
c) if you answered yes to b) and the class in your C# project was also called
Program, you are waiting for this: use the global namespace qualifier!
global::Program.reverse(...). Remember your C#
Program's fully qualified class name is actually something like
Compile and run! Happy days! And marvel in the wonder of Visual Studio 2010 as you step through the code from C# to F# (the call stack window even shows what language your current stack frame is written in!). This is going to be a fun journey...