COM VB.NET works well but C# need recompile

Question

I have a simple C# class with COM attributes:

[ComClass("1DC7B465-49FA-4ad1-893E-C19657E1ED25", "F97459E6-AB37-43e6-AC57-6AE5F9A9A835", "BD9F01C7-162A-4f95-9398-C126C152B965")]
    [ComVisible(true)]
    public class Class1
    {

    }

I need to use this class from VB6 application. It works well until I change AssemblyVersion of .NET dll. Then VB6 doesn't create C# class instance (throws an ACtiveX exception) until I recompile it (VB6 application).

It is interesting that I do not need to recompile Class1 if it is written in VB.NET.

What is the difference between C# and VB.NET here? Is there any way to make C# behave like VB.NET?

what is the ActiveX Exception being thrown?

Chase Florell
– Chase Florell

2010-08-20 05:25:55 +00:00
Commented Aug 20, 2010 at 5:25 — Chase Florell
– Chase Florell, Commented Aug 20, 2010 at 5:25

Franci Penov · Accepted Answer · 2010-08-20 05:49:53Z

1

The most likely difference is between the standard AssemblyInfo.cs and AssemblyInfo.vb generated by the two project wizards. You can compare these two to see if any of the assembly level attributes differ. Btw, I would bet on the version attributes.

answered Aug 20, 2010 at 5:49

Franci Penov

76.1k18 gold badges136 silver badges172 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

SiberianGuy · Accepted Answer · 2010-08-20 09:02:02Z

1

I looked into assemblies generated by C# and VB.NET compiler and found out VB.NET generates Guid attribute in addition to ComClass attribute. C# doesn't do it. So I have added Guid attribute to C# class explicitly and it solved my problem.

answered Aug 20, 2010 at 9:02

SiberianGuy

25.5k58 gold badges161 silver badges273 bronze badges

Collectives™ on Stack Overflow

COM VB.NET works well but C# need recompile

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related