C＃中的`new object（）`和`new {}`有什么区别？ [英] What is the Difference Between `new object()` and `new {}` in C#?

问题描述

首先，我对此进行了搜索，并在堆栈溢出中找到了以下链接：

First of all i searched on this and i found the following links on Stack Overflow:

• 之间的 new object（）和 new {}之间是否有任何区别c＃？


• 对象a = new Dog（）与Dog a = new Dog（）之间的差异

• Is there any difference between `new object()` and `new {}` in c#?
• Difference between object a = new Dog() vs Dog a = new Dog()

但是我对这个答案不满意，没有得到很好的解释（我没有很好地理解）。
基本上，我想知道 new object（）和 new {} 之间的区别。 如何在编译时和运行时对它们进行处理？

But i'm not satisfied with this answer, it's not explained well (i didn't get it well). Basically, i want to know the difference between new object() and new {}. How, they are treated at compile time and runtime?

Secondaly，我有以下代码用于 WebMethods

Secondaly, i have the following code which i have used for WebMethods in my asp.net simple application

[WebMethod]
[ScriptMethod(UseHttpGet = false)]
public static object SaveMenus(MenuManager proParams)
{
    object data = new { }; // here im creating an instance of an 'object' and i have typed it `new {}` but not `new object(){}`.
    try
    {
        MenuManager menu = new MenuManager();    
        menu.Name = proParams.Name;
        menu.Icon = proParams.Icon;
        bool status = menu.MenuSave(menu);
        if (status)
        {
            // however, here i'm returning an anonymous type
            data = new
            {
                status = true,
                message = "Successfully Done!"
            };
        }
    }
    catch (Exception ex)
    {
        data = new { status = false, message = ex.Message.ToString() };
    }
    return data;
}

因此，（如您在代码注释中所见），如何 new object（）{} 和 new {} 的区别？

So, (as you can see in comments in code), How new object(){} and new {} differences?

这是我编写代码的正确方法吗？
您能建议使用此代码的最佳方法吗？

我知道，我不能很好地解释它，我在问很多，但这是我目前拥有的最好的。

I know, i can't explain it well and i'm asking alot, but that's the best i have right now.

推荐答案

new {...} 始终创建匿名对象，例如：

  Object sample = new {};
  String sampleName = sample.GetType().Name; // <- something like "<>f__AnonymousType0" 
                                             //                    not "Object"

同时 new Object（）创建 Object 类的实例

  Object sample = new Object() {};
  String sampleName = sample.GetType().Name; // <- "Object"

因为所有对象（包括匿名对象）均源自对象，您随时可以输入

since all objects (including anonymous ones) are derived from Object you can always type

  Object sample = new {};

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