我已经在.NET 4.6.1 C#项目中看到了这种属性声明
I've seen this kind of property declaration in a .NET 4.6.1 C# project
public object MyObject => new object();我习惯于声明只读属性,例如:
I'm used to declaring read only properties like this:
public object MyObject { get; }我知道两者之间存在一些差异(第一个会创建一个新对象),但是我想要更深入的说明以及何时使用它们的一些指示。
I understand that there are some differences between the two (the first one creates a new object), but I would like a deeper explanation as well as some indications of when to use either of them.
推荐答案第一个使用新的-to-C#-6 表达式主体成员语法。等效于:
The first uses the new-to-C#-6 expression-bodied member syntax. It's equivalent to:
public object MyObject { get { return new object(); } }第二个也是C#6的也是 -自动实现的只读属性。等效于:
The second is also new to C# 6 - an automatically implemented read-only property. It's equivalent to:
private readonly object _myObject; // Except using an unspeakable name public object MyObject { get { return _myObject; } }您只能分配给 MyObject 来自声明类中的构造函数,实际上只是分配给该字段。
You can only assign to MyObject from within a constructor in the declaring class, which actually just assigns to the field instead.
(这两个等价物都使用了老式的属性声明,您总是将 get , set 设置为一个或两个都包含代码的块。)
(Both of these "equivalencies" are using old-school property declarations, where you always have get, set or both as blocks containing code.)
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