What's true about == vs equals

310.

== Operator
1. If operands are Value Types and their values are equal, it returns true else false.
2. If operands are Reference Types with exception of string and both refer to same object, it returns true else false.
3. If operands are string type

.Equals
If operands are Value Types, it performs Reference Equality that is if both refer to same object it returns true else false.
If Operands are Reference Types then unlike == operator it checks for their type first. If their types are same

== Operator
If operands are Reference Types and their values are equal, it returns true else false.
If operands are Value Types with exception of string and both refer to same object, it returns true else false.
If operands are string type

.Equals
If operands are Reference Types, it performs Reference Equality that is if both refer to same object it returns true else false.
If Operands are Value Types then unlike == operator it checks for their type first. If their types are same

1 and 2 correct

3 and 4 correct

View Description

In the most shorthand answer:

== opertator is to check identity. (i.e: a==b are these two are the same object?)

.Equals() is to check value. (i.e: a.Equals(b) are both holding identical values?)

With one exception:
For string and predefined value types (such as int, float etc..),
the operator == will answer for value and not identity. (same as using .Equals())