How do I detect what .NET Framework versions and service packs are installed?

Question

A similar question was asked here, but it was specific to .NET 3.5. Specifically, I\'m looking for the following:

1. What is the correct way to determine which .N

Answer 1

See How to: Determine Which .NET Framework Versions Are Installed (MSDN).

MSDN proposes one function example that seems to do the job for version 1-4. According to the article, the method output is:

v2.0.50727  2.0.50727.4016  SP2
v3.0  3.0.30729.4037  SP2
v3.5  3.5.30729.01  SP1
v4
  Client  4.0.30319
  Full  4.0.30319

Note that for "versions 4.5 and later" there is another function.