C # instance object

Question

What's the difference between:

Object o = new Object();
o.foo();

and

new Object().foo();

(if I don't need a link after that)?

Are there reasons to use one instead of the other (e.g. memory usage)?

Answer 1

There is no difference in deadlines.

There may be a difference in debugging:

• This can be conveniently broken after the object is created, but before it is foo()called
• It may be useful to subsequently check the value of a variable.
• , . ( , , NullReferenceException, , ).

, - , .

Answer 2

, .

Answer 3

o, .
(JIT), , .

. , .

Answer 4

.

, ( ), ildasm, , - witll .

EDIT: actually it is sometimes easier for me to debug when declaring a variable. Easier to check, therefore easier to debug.

Answer 5

EDIT: Invalid code removed

The difference is that in the first case, you can see the object created in the debugger.