Program.cs

using System;
using System.Text;
using System.Collections.Generic;
using System.Collections;
namespace Cs
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> list = new List<string>();
            list.Add("ab");
            list.Sort();
  



            StringBuilder sb = new StringBuilder("Hello",50);
            sb.ToString();
            sb.Append(new String(" world"));
            sb.AppendFormat(" Hello");//
            sb.Replace('H','h');//替換前面參數是要替換的字
            Console.WriteLine(list.Capacity);
            sb.Insert(0,"owo ");//插入
            /*
            foreach(string i in list){
            Console.WriteLine(i);
            }
            */
            
        }
    }
    class part {
       public string partname{get; set; } 
       public int partid{get;   set;}
       public override string ToString(){
           return "partname:"+partname+"ID"+partid;
       }
       public override bool Equals(object obj){
           if(obj==null){return false;}
           part objAspart = obj as part;
           if(objAspart==null){return false;}
           else return Equals(objAspart);
       
       }
       public override int GetHashCode(){

           return partid;
       }
       public bool Equals(part other){
           if(other==null){return false;}
           return(this.partid.Equals(other.partid));
       }


    }
}