C#中装箱和拆箱的区别

装箱和拆箱是 C# 中的一个重要概念。C# 类型系统包含三种数据类型：值类型(int、char 等)、引用类型(对象)和指针类型。基本上，它将值类型转换为引用类型，反之亦然。装箱和拆箱实现了类型系统的统一视图，其中任何类型的值都可以视为对象。

装箱和拆箱的区别 –

装箱的示例：

// C# program to illustrate Boxing using System;  public class YiibaiDemo {     static public void Main()     {         int val = 2024;          // Boxing         object o = val;          // Change the value of val         val = 2025;          Console.WriteLine("Value type of val is {0}", val);         Console.WriteLine("Object type of val is {0}", o);     } } 

运行结果：

Value type of val is 2025 Object type of val is 2024 

拆箱的示例：

// C# program to illustrate Unboxing using System;  public class YiibaiDemo {     static public void Main()     {         int val = 2025;          // Boxing         object o = val;          // Unboxing         int x = (int)o;          Console.WriteLine("Value of o is {0}", o);         Console.WriteLine("Value of x is {0}", x);     } } 

运行结果：

Value type of val is 2025 Object type of val is 2025