Common Language Runtime Assembly.GetTypes() does not work
Question:

Hi,
I am using reflection to load a dll and I am getting the following exception when I try to get the Assembly types using .GetTypes().  Please advice!
 
System.Reflection.ReflectionTypeLoadException was unhandled
  Message="Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information."
  Source="mscorlib"
  StackTrace:
       at System.Reflection.Module.GetTypesInternal(StackCrawlMark& stackMark)
       at System.Reflection.Assembly.GetTypes()
       at ReflectAssembly.Class1.Main(String[] args) in C:\Documents and Settings\aalamo\Desktop\ReflectAssembly\Class1.cs:line 48
       at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

Answer1:

I guess assembly (assembly 1) you're trying to reflect to get types references types defined in the another assembly (assembly 2). 
When you're trying to get a list of  types defined in assembly 1 it (for some nasty reason) fails to load assembly 2 and stops with the exception you'd posted.
Follow the advice given by MS developer and examine LoaderExceptions property of exception to find out that went wrong.
 
 



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Answer2:

"examine LoaderExceptions property of exception to find out that went wrong." that is what the exception says. Thank you very much for pointing that out. I could not have known that on my own. 
Any real solution to this problem.? Some of us really want to know!!

Answer3:

Try the following code:-
 

Public Shared Function GetTypes(ByVal objAssembly As System.Reflection.Assembly) As Type()

Dim objTypes() As Type = Nothing

Try

'In a medium trust environment this call will fail.

'We then just need to get the types that were loaded.

'Thankfully these can be got from the exception.

objTypes = objAssembly.GetTypes()
Catch ex As Reflection.ReflectionTypeLoadException

objTypes = ex.Types
#If DEBUG Then

For Each ex1 As Exception In ex.LoaderExceptions

System.Diagnostics.Debug.WriteLine("--LoaderExceptions: " + ex1.Message)

Next

#End If

End Try

 
Return objTypes

End Function
 

Answer4:

Hi,
I have excatly the same problem.
My LoaderException is Null.
Did'you find any solution ?
Thanks.