标签 C# 数据类型 下的文章
            	            
    			
    			
                
        			从概念上看,值类型直接存储其值,而引用类型存储对其值的引用。这两种类型存储在内存的不同地方。在C#中,我们必须在设计类型的时候就决定类型实例的行为。这种决定非常重要,用《CLR via C#》作者Jeffrey Richter的话来 说,“不理解引用类型和值类型区别的程序员将会给代码引入诡异的bug和性能问题(I believe that a developer who misunderstands the difference between reference types and value types will introduce subtle bugs and performan...                
    		
    	            
    			
    			
                
        			using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
    class BookClass
    {
        private string title;
        private string author;
        private string subject;
        private int book_id;
       ...                
    		
    	            
    			
    			
                
        			using System;
namespace ConsoleApplication7
{
    class Program
    {
        static void Main(string[] args)
        {
            string str1 = "2023";
            int num1 = 0;
            num1 = int.Parse(str1);
            Console.WriteLine(num1);
            //如果不能确定字符串是否可以转成数字,可以用int.TryPa...                
    		
    	            
    			
    			
                
        			using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string ss = "abcdefg";
            char[] cc = ss.ToCharArray();
     ...