How to avoid “too many parameters” problem in API design?

Question

I have this API function:

public ResultEnum DoSomeAction(string a, string b, DateTime c, OtherEnum d, 
     string e, string f, out Guid code)

Answer 1

What you have there is a pretty sure indication that the class in question is violating the Single Responsibility Principle because it has too many dependencies. Look for ways to refactor those dependencies into clusters of Facade Dependencies.