C# string的驻留机制

using System;

 

namespace CSharpConsoleApp

{

    class MyClass

    {

        static void Main()

        {

            string str1 = "111";

            string str2 = str1;

            Console.WriteLine(object.ReferenceEquals(str1, str2)); //true

 

            string str3 = "111";

            string str4 = "111";

            Console.WriteLine(object.ReferenceEquals(str3, str4));//true

 

            string str5 = "111";

            string str6 = "1"+"11";

            Console.WriteLine(object.ReferenceEquals(str5, str6));//true

 

            string str7 = "111";

            string str8 = "1";

            string str9 = str8 + "11";

            Console.WriteLine(object.ReferenceEquals(str7, str9));//false

 

            string str10 = "111";

            string str11 = "1";

            string str12 = string.Intern(str11 + "11");

            Console.WriteLine(object.ReferenceEquals(str10, str12));//true

 

            string str13 = "1";

            string str14 = string.Intern(str13 + "11");

            string str15 = "111";

            Console.WriteLine(object.ReferenceEquals(str14, str15));//true

 

            Console.ReadKey();

        }

    }

}