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 GeekdocsbaiDemo {
    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 GeekdocsbaiDemo {
    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：
C#
Value type of val is 2025
Object type of val is 2025