String comparison : operator==() vs. Equals()

Question

Possible Duplicate:
C#: Are string.Equals() and == operator really same?

For string comparison, which approach is better (and safe):

string s1="Sarfaraz";
string s2="Nawaz";

bool result1 = (s1==s2) ;//approach 1
bool result2 = s1.Equals(s2) ;//approach 2

Or both are same under the hood?

It depends if you consider "dog" and "Dog" to be the same word, while you can manipulate the string in your first approach using String.Equals(S1,S2,StringComparison.CurrentCultureIgnoreCase) can be handy and elegant. — Security Hound, Jan 19 '11 at 20:13
one warning is that if the strings are null you will throw an exception. Of course they if you are comparing their value then your expecting a value. — Security Hound, Jan 19 '11 at 20:32

score 14 · Accepted Answer · edited Jul 14 '14 at 01:33

14

I like Equals() because the available StringComparison option is very useful.

The == and != operators are based on the value, so they are safe to use, even though String is a reference type.

edited Jul 14 '14 at 01:33

DavidRR

answered Jan 19 '11 at 20:05

CaptainPlanet

7

Also worth mentioning if `s1` is `null` the results will differ. – porges Jan 19 '11 at 20:11

1 Answers1