[C#] Creating a DLL to hide your C# code and then use it in your C# program

1. Overview

• A Dynamic Link Library (DLL) is a library that contains functions and codes that can be used by more than one program at a time.
• Once we have created a DLL file, we can use it in many applications. The only thing we need to do is to add the reference/import the DLL file.
• Both .dll and .exe are executable program modules but the difference is that we can’t execute the dll file directly.

2. Creating a .dll file

• Create a new “Class library (.NET Framework)” project

• Code, Build then we’ll receive an output “BinhHelper.dll” file

Source : https://gist.github.com/binh12A3/9b55f79dab96342da40fa8d606adf39d

3. Using .dll file in another project

• Create a new “Windows Forms App (.NET Framework)” project

• Add reference, “Browse” to “BinhHelper.dll” file

• Code

Source : https://gist.github.com/binh12A3/953275788a6bb5a0ac43cc06794db808

See also : https://binh12a3.medium.com/unit-5-shared-library-dynamic-library-98727d656a6b

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