Legacy APL code that is ISO compliant runs in Visual APL.

Visual APL is first and foremost a complete implementation of the APL language.

Arrays, scalars, primitives, quads, prototypes, identities, dynamic typing, APL function syntax, and much more, everything you expect from an APL is in Visual APL.

You leverage your experience as an APL developer with Visual APL. Instead of working in a proprietary development environment, you now create code the way you always have, but are an integral part of the Visual Studio development environment.

With Visual APL there is nothing to give up, what you know now makes you a valuable asset to any development team, integrating your knowledge and code directly into any solution.

Your code comes forward. Instead of having to attempt to rewrite your code into a language, like C#, which has no support for array manipulation, your code is now a valuable asset instead of something which will be lost to history.

Just as in any APL implementation there are some differences between Visual APL and any other APL, but function for function your code should move to Visual APL with very few changes.

In addition to APL, we have also integrated the ability to interface directly with the .Net world implementing the bulk of the C# language syntax. This does not affect your APL syntax in any way; it simply provides you the tools to directly interact with .Net

From the first moment you use Visual APL you can be productive, as you need to do more with .Net, just learn what you need, when you need it.