reflection question (advanced)

[Matt]

Hi,

Is it possible to write a method which can take both a normal
instansiated type and reflection instansiated type?

For example, the following code doesn't work. It throws a casting
exception claiming that a type cannot be converted to another type
(they are both the same reported type - RoundedRectangl e):

///code that sets classThatImplem entsFactorySupp liedInterface by
enumerating types in an assembly. Works fine
///...
//problem code
ConstructorInfo cInfo =
classThatImplem entsFactorySupp liedInterface.G etConstructor(a rgumentTypes);
object o = cInfo.Invoke(ne w object[] { });
Console.WriteLi ne(((RoundedRec tangle)o).ZInde x.ToString()); //throws
casting exception

Perhaps this isn't possible - i'd like to write a factory method which
can select a dll dynamically and invoke its interface methods to
provide data access. The factory method can also opt to instansiate a
concrete type declared in the executing assembly (which implements the
interface).

Is this even possible?
Thanks in advance
Matt

[Jon Skeet [C# MVP]]

Matt <m.*****@lbs-ltd.comwrote:

Is it possible to write a method which can take both a normal
instansiated type and reflection instansiated type?

For example, the following code doesn't work. It throws a casting
exception claiming that a type cannot be converted to another type
(they are both the same reported type - RoundedRectangl e):

I suspect you'll find that they're not *really* the same type though.
Usually this happens if one type was loaded from one DLL, and another
was loaded from a different DLL (possibly with the same name but from a
different directory).

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Matt]

On 17 Oct, 21:38, Jon Skeet [C# MVP] <[e-mail] mwrote:

Matt <[e-mail]:

Is it possible to write a method which can take both a normal
instansiated type and reflection instansiated type?

For example, the following code doesn't work. It throws a casting
exception claiming that a type cannot be converted to another type
(they are both the same reported type - RoundedRectangl e):

I suspect you'll find that they're not *really* the same type though.
Usually this happens if one type was loaded from one DLL, and another
was loaded from a different DLL (possibly with the same name but from a
different directory).

--
Jon Skeet - <[e-mail] m>http://www.pobox.com/~skeet Blog:http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

I see, thanks, that worked - by re-jigging my test code so that each
type derived from a common dll. Excellent. Thanks Jon