都是枚举枚举常数吗？它们在编译时或运行时是否被转换为其值？
解决方法
他们是不变的是的,编译时间.
参考：
http://msdn.microsoft.com/en-us/library/sbbt4032.aspx
从介绍：
The enum keyword is used to declare
an enumeration,a distinct type that
consists of a set of named constants
called the enumerator list.
在“鲁棒编程”下：
Just as with any constant,all
references to the individual values of
an enum are converted to numeric literals at compile time. This can create potential versioning issues as described in Constants (C# Programming Guide).
