why does ReferenceEquals(s1,s2) returns true

Question

  String s1 = \"Hello\";
  String s2 = \"Hello\";

Here s1, s2 are different but then why ReferenceEquals() is returning true

Answer 1

Strings are immutable, once it created in the memory following same String objects are refered to the previously created String object for more http://msdn.microsoft.com/en-us/library/362314fe.aspx