whether int is a value type or reference type?

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C#

hi all...

whether int is a value type or reference type?

:confused:

obviously it is value type but...if we does following

line 1 int a =10;
line 2 a.tostring()

line 2 shows that a calls the mathod of its base class (which is object).it means int is a class then how do we call it a value type...???

thanks in advance
if some ons call help please...