How can I create F# dll and call it in C#? Thank you
If you are using the latest version, all you should need to do is set the project type to 'F# Library' when you create the project.
To create a DLL in F#, you should set the output type to class library in project properties. Use Add Reference dialog as mentioned before to add the reference in your C# project.
There's no real trick; like
http://lorgonblog.spaces.live.com/blog/cns!701679AD17B6D310!307.entry
only the other way around. One thing to note is that if you don't specify a namespace in the F# code, all your top-level definitions by default end up in a module with the name of the file, so if you have Program.fs then you may reference Program.Whatever from C#.