Be aware that boxing and unboxing values so that you can use the Base Class Libraries carries a performance cost.
Latest Boxing and UnBoxing Articles
Latest CodeGuru Developer Columns
With the addition of the C/C++ extension to Visual Studio Code, you might have what is needed in a small, cross-platform editor.
Learn how to set up unit tests using an existing database and by using new, custom SQL scripts.
Learn how to do Linear algebra with Visual Basic.NET.
Onion Architecture addresses the challenges faced with 3-tier and n-tier architectures, and provides a solution for common problems.