TypeLoadException - Could not load type because the format is invalid

[O.B.]

I recently changed a struct to a class and made its layout Sequential
instead of Explicit for Marshalling. And now I'm getting the
following error when running my unit tests. I have verified that all
DLLs and EXEs are being completely rebuilt. Is there a way to find
out what "format" is invalid or what format is expected?

System.TypeLoad Exception: Could not load type
'MUSE.DIS.PDUs. Entity.EntitySt ate' from assembly 'MUSE_Common,
Version=8.1.0.2 1285, Culture=neutral , PublicKeyToken= null' because the
format is invalid.

[O.B.]

Re: TypeLoadExcepti on - Could not load type because the format isinvalid

Here's some more information. If I remove the StructLayout
declaration from the following code. It runs but then bombs when it
comes to doing the Marshaling.

namespace MUSE.DIS.PDUs.E ntity
{
[StructLayout(La youtKind.Sequen tial, Pack=1)]
public class EntityState : PDU
{
// Hidden
}
}

As used in test code:

EntityState testPDU = new EntityState();

[Nicholas Paldino [.NET/C# MVP]]

Re: TypeLoadExcepti on - Could not load type because the format is invalid

You will need to post the structure definition, the original signature
of the function (in C++), the function as declared in C# as well as how it
is called. Without those, it's very difficult to tell what is going on.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"O.B." <funkjunk@bells outh.netwrote in message
news:ad6673c6-8f6b-41e0-972b-7c0716fd6c40@i1 8g2000prf.googl egroups.com...

Here's some more information. If I remove the StructLayout
declaration from the following code. It runs but then bombs when it
comes to doing the Marshaling.
>
namespace MUSE.DIS.PDUs.E ntity
{
[StructLayout(La youtKind.Sequen tial, Pack=1)]
public class EntityState : PDU
{
// Hidden
}
}
>
As used in test code:
>
EntityState testPDU = new EntityState();

[O.B.]

Re: TypeLoadExcepti on - Could not load type because the format isinvalid

The problem has been resolved. EntityState inherited from PDU and PDU
did not have a StructLayout declared. I would have never guessed that
from the TypeLoadExcepti on message. Maybe Microsoft could beef the
message up somewhat?



On Nov 11, 12:56 pm, "Nicholas Paldino [.NET/C# MVP]"
<m...@spam.guar d.caspershouse. comwrote:

    You will need to post the structure definition, the original signature
of the function (in C++), the function as declared in C# as well as how it
is called.  Without those, it's very difficult to tell what is going on..
>
--
          - Nicholas Paldino [.NET/C# MVP]
          - m...@spam.guard .caspershouse.c om
>
"O.B." <funkj...@bells outh.netwrote in message
>
news:ad6673c6-8f6b-41e0-972b-7c0716fd6c40@i1 8g2000prf.googl egroups.com...
>

Here's some more information.  If I remove the StructLayout
declaration from the following code.  It runs but then bombs when it
comes to doing the Marshaling.

>

namespace MUSE.DIS.PDUs.E ntity
{
 [StructLayout(La youtKind.Sequen tial, Pack=1)]
 public class EntityState : PDU
 {
   // Hidden
 }
}

>

As used in test code:

>

EntityState testPDU = new EntityState();