在C＃中确定类的default（）值

Question

MSDN's documentation on standard C# classes doesn't seem to contain what the default value for that type is. Am I not looking in the right place? Specifically, I am trying to figure out what the default value of XElement is.

I can always run my program and figure it out then, but I'd like a way to avoid that, if possible.

Edit: This page shows the default values for the native types, but I'm wondering about complex types.

Answer 1

The default value for all reference types is null .As stated in here :

The solution is to use the default keyword, which will return null for reference types and zero for numeric value types.