(int) and convert.toint() difference between them [duplicate]

This question already has answers here: Closed 11 years ago.

Possible D开发者_StackOverflow中文版uplicate:

difference between Convert.ToInt32 and (int)

What it difference between (int) and convert.toint() methods?

like

object o = 123;
int i = (int)o;
and
int i = Convert.ToInt16(o);

What is the difference in both of them?

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The first method is (Un)Boxing the second method is conversion

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You can convert another type to an int but to cast to an int it needs to be a boxed int.

e.g.:

string s = "123";
int i = Convert.ToInt16(s);

or

object o = 123;
int i = (int)o;

works fine. However:

string s = "123";
int i = (int)s;

won't compile.