Answer:For value types : “==” and Equals() works same way : Compare two objects by VALUE Example: int i = 5; int k= 5; i == k > True i.Equals(k) > TrueFor reference types : both works differently : “==” compares reference – returns true if and only if both references point to the SAME object while "Equals" method compares object by VALUE and it will return true if the references refers object which are equivalent Example: StringBuilder sb1 = new StringBuilder(“Mahesh”); StringBuilder sb2 = new StringBuilder(“Mahesh”); sb1 == sb2 > False sb1.Equals(sb2) > TrueBut now look at following issue: String s1 = “Mahesh”; String s2 = “Mahesh”; In above case the results will be, s1 == s2 > True s1.Equals(s2) > True String is actually reference type : its a sequence of “Char” and its also immutable but as you saw above, it will behave like Value Types in this case. Exceptions are always there ;)Now another interesting case: int i = 0; byte b = 0; i == b > True i.Equals(b) > False So, it means Equals method compare not only value but it compares TYPE also in Value Types.Recommendation : For value types: use “==” For reference types: use Equals method.