[billybob]

Yes, but .NET is a Microsoft platform. Are there any non-Microsoft-specific platforms for which Windows is the best development environment? Because the majority of languages, frameworks, etc in the world are not made by Microsoft.

[cnkeller]

That's impossible to answer, because the definition of best is completely subjective.

Best is what works for you in whatever role you happen to be in. I know people using windows coding in RoR, Python, Java, etc with a high degree of efficiency. I know others who are doing the same thing on Linux and OS X. It works for them.