I am using C# .net 3.5 to build an application. I have been working with optional parameter attributes in .net 4.0 with no problems. I did notice that with 3.5 there is the opti
Take a look at the following StackOverflow thread: C# Optional Parameters in .net 3.5
No use in copy pasting everything which has been said there, as the thread covers pretty much everything. Good luck.