Question

I have some code that runs within a multithreaded class.
Basically i create many threads which contain instance of this class.

Within this class i create an object to either a vb6 or .net dll using reflection, then i call a method within that object. The object that gets called can be different every time.

But for some reason even through i have multiple threads going when i get to the Activator.CreateInstance it is no longer multithreaded. Why is that? How do i fix it?

I want to catch the error returned and put it in a log.

            If UCase(pRow("TypeVB6").ToString()) = "TRUE" Then
                classType = Type.GetTypeFromProgID(ClasstoInstantiate, True)
            Else
                classType = Type.GetType(ClasstoInstantiate, True)
            End If

            Dim o As Object = Activator.CreateInstance(classType)
            cError = classType.InvokeMember(MethodName, BindingFlags.InvokeMethod Or BindingFlags.Instance Or BindingFlags.Public, Nothing, o, New Object() {FilePath, VirtDir})

Answer 1

A couple of ideas for a solution:

1) Verify that the main entry point for your service is decorated with the MTAThread Attribute

2) Wrap the Activator.CreateInstance call (and possibly the following InvokeMember method) in a SyncLock statement.