Including Custom Client-side Validations in your ASP.NET MVC App

I'm a freelance software developer/architect located in Southern Germany with 20 years of experience in C++, VB, and C# software projects. Since about ten years I do all my coding exclusively in C# for business application development - and nowadays Python for Data Science, ML, and AI.
I am especially dedicated to Test-driven development, OO architecture, software quality assurance issues and tools.