Get set是属性的访问修饰符。 Get读取属性字段。 Set设置属性值。 Get类似于只读访问。 Set类似于只写访问。 要将属性用作读写，必须同时使用get和set。

基本上它有助于保护你的数据。考虑这个没有setter和getter的例子，以及有它们的同一个例子。

没有setter和getter

类学生

using System;
using System.Collections.Generic;
using System.Text;

namespace MyFirstProject
{
    class Student
    {
        public string name;
        public string gender;
        public Student(string cName, string cGender)
        {
            name = cName;
            gender= cGender;
        }

     }
}

在主

 Student s = new Student("Some name", "Superman"); //Gender is superman, It works but it is meaningless
 Console.WriteLine(s.Gender);

使用setter和getter

using System;
using System.Collections.Generic;
using System.Text;

namespace MyFirstProject
{
    class Student
    {
        public string name;
        private string gender;
        public Student(string cName, string cGender)
        {
            name = cName;
            Gender = cGender;
        }

        public string Gender
        {
            get { return gender; }
            set
            {
                if (value == "Male" || value == "Female" || value == "Other")
                {
                    gender = value;
                }
                else
                {
                    throw new ArgumentException("Invalid value supplied");
                }
            }
        }
    }
}

主要:

  Student s = new Student("somename", "Other"); // Here you can set only those three values otherwise it throws ArgumentException.
Console.WriteLine(s.Gender);

这是一种将数据成员公开为公共的快捷方式，这样您就不需要显式地创建私有数据成员。c#将为您创建一个私有数据成员。

您可以不使用此快捷方式将数据成员设为公共，但如果您决定更改数据成员的实现以具有某些逻辑，则需要破坏接口。因此，简而言之，它是创建更灵活代码的捷径。

属性是用于封装数据的函数，并允许在每次检索或修改值时执行额外的代码。

c#不同于c++， VB。Net或Objective-C没有一个单独的关键字来声明属性，而是使用两个关键字(get/set)来给出一个简短的语法来声明函数。

But it is quite common to have properties, not because you want to run additional code when data is retrieved or modified, but because either you MIGHT want to do so in the future or there is a contract saying this value has to be a exposed as a property (C# does not allow exposing data as fields via interfaces). Which means that even the abbreviated syntax for the functions is more verbose than needed. Realizing this, the language designers decided to shorten the syntax even further for this typical use case, and added “auto” properties that don’t require anything more than the bare minimum, to wit, the enclosing braces, and either of the two keywords (separated by a semicolon when using both).

在VB。Net中，这些“auto”属性的语法与c#中的长度相同——属性X为字符串vs字符串X {get;Set;}，两种情况下都是20个字符。它实现了这样的简洁，因为在正常情况下，它实际上需要3个关键字，而在auto属性的情况下，可以不需要其中的2个。

如果从这两者中删除更多，要么就必须添加一个新的关键字，要么就必须赋予符号或空白以意义。

这意味着，如果您创建类型为Genre的变量，您将能够将该变量作为属性访问

Genre oG = new Genre();
oG.Name = "Test";

The get/set pattern provides a structure that allows logic to be added during the setting ('set') or retrieval ('get') of a property instance of an instantiated class, which can be useful when some instantiation logic is required for the property. A property can have a 'get' accessor only, which is done in order to make that property read-only When implementing a get/set pattern, an intermediate variable is used as a container into which a value can be placed and a value extracted. The intermediate variable is usually prefixed with an underscore. this intermediate variable is private in order to ensure that it can only be accessed via its get/set calls. See the answer from Brandon, as his answer demonstrates the most commonly used syntax conventions for implementing get/set.