Why you should care

This unexpected application or machine behavior occurs a result of awkward/unreliable methods of handling errors and interacting with memory – that includes using pointers, forcing garbage collection, unstructured exception handling etc.

Business Impacts

The use of certain (unrecommended) built-in commands can increase the likelihood for applications to malfunction and fail in a production environment. Debugging and working with these commands can increase development time significantly.

CAST recommendations

Identifying the built-in functions that can potentially cause reliability issues from the patterns above and encourage developers to seek alternatives to these risky commands. Documentation of most of these identified issues can be easily found online and in the references below.

References

https://stackoverflow.com/questions/118633/whats-so-wrong-about-using-gc-collect

http://www.vbforums.com/showthread.php?759361-RESOLVED-Need-Full-Understanding-of-VarPtr-StrPtr-ObjPtr

https://docs.microsoft.com/en-us/dotnet/visual-basic/language-reference/statements/resume-statement

https://stackoverflow.com/questions/29418248/what-does-the-vb-net-ubound-function-actually-do-and-why-does-the-msdn-document