I get the following exception when my unmanaged code attempts to invoke the
delegate that follows:

Delegate Declaration:

  protected delegate uint
     ReadProc(
              [MarshalAsUnmanagedType.LPArray,
ArraySubType=UnmanagedType.U1, SizeConst=12)] byte [] fvData,
              UIntPtr pfvuiSize,
              Object fvContext);

Exception:
  An unhandled exception of type
'System.Runtime.InteropServices.MarshalDirectiveException' occurred in
system.windows.forms.dll
  Additional information: Array size control parameter must be an integral
type.

I don't understand why the exception is occurring as I have specified an
integral SizeConst.

Background to the problem is as follows:
- allocate array in C# and pass it to P/Invoke worker function along with a
delegate
- worker invokes delegate to populate the array and specify # of bytes
copied into the array
- object is just a parameter passed to the worker function that the worker
passes to the delegate (not important)
- I know how big the array is, because I allocated it - however, I've found
that I need to specify that size when marshalling, otherwise it will think
the array is only 1 byte long in the method passed as the delegate
- when I specify the size, however, I get the exception noted above

I would greatly appreciate any insight into this issue.

Thanks, Tyler