Execution order of conditions in C# If statement

Question

There are two if statements below that have multiple conditions using logical operators. Logically both are same but the order of check differs. The first one works and the

Answer 1

The && and || operators short-circuit. That is:

1) If && evaluates its first operand as false, it does not evaluate its second operand.

2) If || evaluates its first operand as true, it does not evaluate its second operand.

This lets you do null check && do something with object, as if it is not null the second operand is not evaluated.