Incomplete info in linq equals operator section

docs/csharp/language-reference/keywords/join-clause.md

@@ -58,7 +58,7 @@ For more information, see [Perform left outer joins](../../linq/perform-left-out
 
 ## The equals operator
 
-A `join` clause performs an equijoin. In other words, you can only base matches on the equality of two keys. Other types of comparisons such as "greater than" or "not equals" are not supported. To make clear that all joins are equijoins, the `join` clause uses the `equals` keyword instead of the `==` operator. The `equals` keyword can only be used in a `join` clause and it differs from the `==` operator in one important way. With `equals`, the left key consumes the outer source sequence, and the right key consumes the inner source. The outer source is only in scope on the left side of `equals` and the inner source sequence is only in scope on the right side.
+A `join` clause performs an equijoin. In other words, you can only base matches on the equality of two keys. Other types of comparisons such as "greater than" or "not equals" are not supported. To make clear that all joins are equijoins, the `join` clause uses the `equals` keyword instead of the `==` operator. The `equals` keyword can only be used in a `join` clause and it differs from the `==` operator in some important ways. When comparing strings, `equals` has an overload to compare by value and the operator `==` uses reference equality. When both sides of comparison have identical string variables, `equals` and `==` will reach the same result: true. That's because, when a program declares two or more equivalent string variables, the compiler stores all of them in the same location, see [Reference equality and string interning](../../how-to/compare-strings.md#reference-equality-and-string-interning) for more information. Another important difference is the null comparison: `null equals null` is evaluated as false with `equals` operator, instead of `==` operator that evaluates it as true. Lastly, the scoping behavior is different: with `equals`, the left key consumes the outer source sequence, and the right key consumes the inner source. The outer source is only in scope on the left side of `equals` and the inner source sequence is only in scope on the right side.
 
 ## Non-equijoins