Create dll using C# and VB.Net in ASP.Net

I will get back to you soon.

Hi vereato,

Create a class library project choose the language whatever you want (C#, VB.Net)

Write whatever logic you want then build that library by right clicking the solution you can get the dlls of that project in bin folder of your project.

There are two options to build the project in release mode/ debug mode. It will always better to choose release mode when you are going to deploy.

Refer below links.

https://www.c-sharpcorner.com/UploadFile/rohatash/creating-dll-using-class-library-in-net-framework/

https://www.c-sharpcorner.com/UploadFile/1e050f/creating-and-using-dll-class-library-in-C-Sharp/