Re: about equal

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#520

From: Barry Mossman
Date: Fri, 12 Nov 2004 02:51

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"lobster" <superxr@21cn.com> wrote in message 
news:41941ac9@newsgroups.borland.com...
> hi,all, what's the difference between
> equals, referenceequals,==?
>
> like this:
> string a = "123";
> string b = "123";
> bool flag = ReferenceEquals(a,b);
> why the flag is true?

Will be compiler optimisation.

try:
   string a = "123";
   string b = "1";
   string c = "23";
   string d = b + c;
   bool flag = ReferenceEquals(a,d);
   Console.WriteLine(d);

   Console.WriteLine(flag);
   flag = Equals(a,d);
   Console.WriteLine(flag);
   Console.ReadLine();

Barry Mossman

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