我需要知道这三个关键字对象，动态和 VAR的区别在C＃。

I need to know the difference between these three keywords Object , Dynamic and var in C#.

我已经看到了这链接，但我不明白，在这种情况下，我必须使用每一个。

I have seen this link but i don't understand in which case i have to use each one.

您可以给我解释一下，请，这些关键字的区别？什么是每个关键字的事业吗？

Can you explain for me, please, the difference between these keywords ? What are the utilities of each keyword?

推荐答案

一切都是对象，每一个类型的对象继承了一下，一个简单的 INT 变量可以拳击到对象。例如：

Everything is object, every type inherit from Object in a moment, a simple int variable can be boxing to an object. For example:

object a = 10; // int
object b = new Customer(); // customer object
object c = new Product(); // product object
object d = "Jon"; // string
object e = new { Name = "Felipe", Age = 20 }; // anonymous type

有最抽象为任何类型，它是一个引用类型。如果你想获得真正的类型，则需要拆箱是：

It is the most abstraction for any type and it is a reference type. If you want to get the real type, you need to unbox it:

object a = "Some Text";
string a1 = a.ToString();

// call a string method
a1.ToUpper();

object i = 10; // declared as object but instance of int
int i2 = (int) i; //declare as an int ... typed

动态是NA实现在C＃中的动态方面，它不是强类型。例如：

Dynamic is na implementation of a dynamic aspect in C#, it is not strongly typed. For example:

dynamic a = new Class();
a.Age = 18;
a.Name = "Jon";
a.Product = new Product();

a.Name; // read a string
a.Age; // read an int
a.Product.Name; // read a property

VAR 仅仅是C＃语言的关键字，你可以因为你有一个类型，初始化它，例如创建任何类型：

var is just a keyword of the C# language, you can create any type since you initialize it with a type, for example:

var a = 10; // int
var b = 10d; // double
var c = "text"; // string