How do I use C# to build COM addin?

Question

Hi,I would like to build COM component add-in using C# instead of Since QSRules.dll is not strong named, I cannot reference it directly in C# ..NET.Here is what I did.1. Create C# Class library.2. sn -k 3. Add this line [assembly: AssemblyKeyFile("")] in AssemblyInfo.cs4. Declare Entry Point.     public bool Process( session)      {                        return true;     }       Unfortunately, it cannot be compiled because QSRules is not strong named. So it give error message saying that "Assembly generation failed -- Referenced assembly 'Interop.QSRules' does not have a strong name". As far as I know, RMS customized add-in component should be strong named to be installed in assembly cache.So I tried to change the entry point code like     public bool Process(object session) {              return true;}Obviously, this code only works for  because as far as I know,  is very generous lanague. Since C# is strong typed language, session object DOESNOT know what the Cashier is at compile time, so it generates error. How do I write COM add-in component using C#?Does anyone know to workaround for this?Thank you in advance...............................................................TJ

lzcouponex · Accepted Answer

I had the same issue before, because I am C# programmer. However, after trying to program COM add-in in C# without success, I gave up eventualy, and live with  It is just a case that tests your adaptivity.

Ken B · Answer

Did you try running QSRules through TLBIMP.exe utility and giving ityour own strong key name to produce a new interop ?

TJ · Answer

HI,Wow, great. Thank you very much for your suggestion.BTW, I got a this message when using TLBIMP.exeTlbImp warning: Type library importer has encountered an interface notderived from IUnknown: _HiddenInterface.It only happened at the first time. When I tried to covert using TLBIMP from second time, that message didn't come up.Can I safelfy ignore the warning message?Thanks again........................................................................TJ"Ken B" wrote:

Glenn Adams [MVP - Retail Mgmt] · Answer

I did some testing a while ago, and tried using a VB.Net component to 'catch the hook' from RMS, then call a c# component to do the work. I just raised a message box in my test, but was able to get c# code executing from within RMS. You still need to reference QSRules from within your c# project, but you don't have to register your project for COM Interop, so you avoid the strong name problem.

Basically I decided it wasn't worth the trouble, since you have to take an object as a parameter and cast it to a SessionClass before you can do anything with it. This isn't such a big deal, except that MS insists on breaking compatibility every time they release a hot fix, so you would need a version of your add-in for every hot-fix you install.

How do I use C# to build COM addin?

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