An easy question about GetType()

[TonyJ]

Hello!!

This first expression return System.Int32. The type that is returned is a
string. This is perfect understandable.
Console.WriteLi ne(7.GetType(). FullName);

In this second expression is the same returned System.Int32. The type that
is returned is System.RuntimeT ype
Console.WriteLi ne(7.GetType()) ;

Now to my question how can the System.Int32 be written when the type is
System.RuntimeT ype

//Tony

[Marc Gravell]

No; 7.GetType() returns a Type instance, representing System.Int32.
There are different variants of Type, however, depending on the
scenario. In this case, Type instance (representing System.Int32)
happens to be a RuntimeType. However, it still *represents*
System.Int32.

Does that make sense? RuntimeType is the Type of the Type ;-p

If the question is about what gets written, then it is because
RuntimeType.ToS tring() has been overridden to return the name of the
represented type.

Marc

[Alberto Poblacion]

"TonyJ" <jo************ *****@telia.com wrote in message
news:Oo******** ******@TK2MSFTN GP06.phx.gbl...

[...]
In this second expression is the same returned System.Int32. The type that
is returned is System.RuntimeT ype
Console.WriteLi ne(7.GetType()) ;

Console.WritelL ine calls the ToString method on its Object argument, so
you are actually seeing 7.GetType().ToS tring(), which happens to return
"System.Runtime Type".

Now to my question how can the System.Int32 be written when the type is
System.RuntimeT ype

In your other example, Console.WriteLi ne(7.GetType(). FullName);, you are
invoking the property FullName on the result of GetType, which does not
return the same value as the method ToString of the same object.

[TonyJ]

Hello!!

You say that
"RuntimeType.To String() has been overridden to return the name of the
represented type."

I haven't overridden anything not even ToString(). What do you mean?

//Tony
"Marc Gravell" <ma**********@g mail.comskrev i meddelandet
news:Oh******** ******@TK2MSFTN GP05.phx.gbl...

No; 7.GetType() returns a Type instance, representing System.Int32.
There are different variants of Type, however, depending on the
scenario. In this case, Type instance (representing System.Int32)
happens to be a RuntimeType. However, it still *represents*
System.Int32.

Does that make sense? RuntimeType is the Type of the Type ;-p

If the question is about what gets written, then it is because
RuntimeType.ToS tring() has been overridden to return the name of the
represented type.

Marc

[Jon Skeet [C# MVP]]

On Oct 2, 12:50 pm, "TonyJ" <johansson.ande [e-mail] wrote:

You say that
"RuntimeType.To String() has been overridden to return the name of the
represented type."

I haven't overridden anything not even ToString(). What do you mean?

The type "System.Runtime Type" has overridden ToString(). That
overridden method is what's being called when you write:

Console.WriteLi ne(7.GetType()) ;

I'm still not entirely clear what you're trying to do. Could you give
more description of what you're trying to achieve?

Jon

[Marc Gravell]

I haven't overridden anything not even ToString().
But then, you didn't write RuntimeType either...

Where are you even seeing RuntimeType? I've just tried:
Console.WriteLi ne(7.GetType()) ;
Console.WriteLi ne(7.GetType(). ToString());
Console.WriteLi ne(7.GetType(). FullName);

If you are using 1.1, then you're on your own - I burnt all my 1.1
tools a while ago ;-p
On 2.0 (which covers 3.0) and 3.5 it outputs System.Int32 three
times... I can only assume that you are looking in the IDE (immediate
window, or hover, etc) - in which case it will tell you about the
instance that is being queried, including it's Type (which in this
case *happens* to be a Type itself [specifically, RuntimeType], but
that is coincidence).

So where are you seeing "RuntimeTyp e"?

Marc