C#就地修改字符串

 1 class UnsafeString
 2 {
 3     unsafe static void Main(string[] args)
 4     {
 5         // Compiler will store (intern) 
 6         // these strings in same location.
 7         string s1 = "Hello";
 8         string s2 = "Hello";
 9 
10         // Change one string using unsafe code.
11         fixed (char* p = s1)
12         {
13             p[0] = ‘C‘;
14         }
15 
16         //  Both strings have changed.
17         Console.WriteLine(s1);
18         Console.WriteLine(s2);
19 
20         // Keep console window open in debug mode.
21         Console.WriteLine("Press any key to exit.");
22         Console.ReadKey();
23     }
24 
25 }