c# string

01 publicstatic void RunSnippet()
02     {
03         string s= "aa";
04         strings1 = "aa";
05         strings2 = "a" + "a";
06         strings3 = "a";
07         strings4 = s3 + "a";
08         WL(s.GetHashCode());
09         WL(s1.GetHashCode());
10         WL(s2.GetHashCode());
11         WL(s3.GetHashCode());
12         WL(s4.GetHashCode());
13         GetStr(s);
14         WL(s.GetHashCode());
15     }
16    
17     private static void GetStr(string s)
18     {
19         WL(s.GetHashCode());
20         s ="cccc";
21         WL(s.GetHashCode());
22     }

1 string是final不可以改变的
2 string pool的使用，因为string类型在C#中经常使用
3 s = "ccc"其实是新建了一个新的实例。