.net - Object.Equals clarification in C#? -

.net - Object.Equals clarification in C#? -

i've made simple test :

object t = 3; object aa = 3; #1 console.writeline(t.equals(aa)); #2 console.writeline(t.equals(3)); #3 console.writeline(3.equals(aa));

all of them true.(that's problem actually).

looking @ object , used function:

public virtual bool equals(object obj);

the equals virtual. can overridden.

but don't see polymorphic behavior. pure boxed value.

regarding line #1 t.equals(aa)

the reference type static type - object.

so thought should phone call object.equals : means reference different , meaning first reply should false.(and wrong here). why that?

regarding line #2 t.equals(3)

again, t's static type object. object.equals running. how come true ?

regarding line #3 3.equals(aa)

i believe public override bool equals(object obj); running because static type int. , param type object. why true ? un-box value ?

it seems , somehow unboxes object without notice :-(

objects equals method polymorphic, can overriden subtypes int. int32.equals overrides method value comparing between current object , argument, , since arguments equal 1 time unboxed, returns true.

there 2 overload of int32.equals - bool equals(object) , bool equals(int). bool equals(object) overload 1 overriden object. since t , aa object references, method called in examples 1 , 2.

in illustration 3, still overload called since aa object , hence valid overload.

the == operator static , resolved statically based on types of arguments, both object in example. == operator object compares references, , in case homecoming false 2 separate boxed ints.

c# .net equals