.NET Framework版本与C＃语言版本的关系

Question

I've inherited an app. The app has to use .NET 2.0. However, I would like to make use of a feature introduce in C# 4.0 (optional arguments). I understand that a framework is separate from a language. However, what I'm not sure of is, can I use this C# feature in the context of .NET 2.0?

The code compiles. I wasn't sure if this was legitimate, or if I just got lucky :).

Thank you for your insights.

Answer 1

Optional arguments/parameters have been supported in CLR since CLR 1.0. This is due to CLR support for VB.net.

This is why your code compiles. Other new 4.0 features may not work the same.

Other post-C# 2.0 features that will compile into a .NET 2.0 application include named arguments, lambda expressions, auto properties, & extension methods.