DLL in .Net

Question

Hi friends Can we make changes in DLL in .net?

Vulpes · Answer

Sam I know very well that there are different types of DLL - I ought to do as you've told us enough times! I thought the question was 80% clear which is enough for me to offer a short answer. The use of the words 'IL' and 'assembly' make it clear that I'm talking about a .NET class library. The chances that anyone would be asking about changing a native or COM DLL using a .NET program seemed to me to be so remote that I dismissed it immediately and there is nothing in Akshay's previous posts to suggest that he's interested in doing low level stuff such as that anyway. Evidently Senthilkumar came to the same conclusions as me.

Sam Hobbs · Answer

You do not know that. It is a guess. I think it is better to get clarification first. You should at least say that you are guessing about the problem. You should say that if the DLL is not a .Net Class Library then what you are saying does not apply. It probably took Akshay one minute to type the question. The rest of us have spent much more time trying to guess. I think it is good to help members to be more clear about what they need help with. I do not expect perfection; I just think we can do more to help others to help us to help them. I hope Akshay will clarify what is needed; at least try to clarify things.

Senthilkumar · Answer

Hi Hobbs i think the question he wanted to ask is  The DLL was created by some one and he has only dll. Now he wants to do some changes on it. He wants to do deassemble the code. If i am right then if the DLL has not been made by .Net fuscator then it is possible. We can convert the assembly .dll file into source code by using .Net reflector. You can download it in http://www.reflector.net/

Sam Hobbs · Answer

Senthilkumar your suggestion will not help Akshay if the DLL is not a class library. Are you familiar with native DLLs? Are you familiar with COM types of DLLs such as ActiveX DLLs? The question is  Can we make changes in DLL in .net?  and no one is answering that question because that question does not make sense. The question seems to be asking if it is possible to change a DLL using .Net. It is not asking about a .Net DLL. Akshay might be trying to ask about a .Net Class Library but the question is not clear. Please let us get clarification first.

Senthilkumar · Answer

Hi Creating DLL in .Net is easy. You need to create the class library and it allows to add the class images resources etc. You need to build it and it will generate the dll file. I suggest you to go through link. It will guide you step by step to create the dll .net. http://www.c-sharpcorner.com/uploadfile/syedshakeer/how-to-create-a-dll-file-in-net-framework-using-visual-studio/

Sam Hobbs · Answer

For some reason Vulpes does not understand that there are many types of DLLs. The answer to this question depends on the type of DLL. The answer also depends on what you need to change. You cannot change a DLL using a .Net program; at least not most things and not without knowledge of machine language and advanced knowledge of Windows. The one thing that can be changed relatively easily is the resources in a DLL but I assume that is not what you are asking about.

Vulpes · Answer

If you have the source code (or even just the IL) then yes you can make changes and rebuild the DLL assembly.