c# - 公共(public)成员与 C# 中类的构造函数？

Question

我有疑问。

1. namespace JIMS.ViewModel.Stock
2. {
3.     internal class StockGroupViewModel : JIMS.ViewModel.BaseViewModel
4.     {
5.         JIMSEntities dbContext = new JIMSEntities();
6. 
7.         public StockGroupViewModel()
8.         {                     
9.          dbContext = new JIMSEntities();
10.        }
11.    }
12. }

我有这门课。我想知道先调用哪个。当我创建此类的实例时

StockGroupViewModel s = new StockGroupViewModel();

第 5 行或第 9 行。

Answer 1

第 5 行 - 它是一个字段初始化程序，在构造函数中的任何代码之前执行。

来自规范:

10.5.5.2 Instance field initialization

The instance field variable initializers of a class correspond to a sequence of assignments thatare executed immediately upon entry to any one of the instanceconstructors (§10.11.1) of that class. The variable initializers areexecuted in the textual order in which they appear in the classdeclaration. The class instance creation and initialization process isdescribed further in §10.11.