Is .NET 5.0 and C# 9 a "threat" to D?

[Gregor Mückl]

On Thursday, 12 November 2020 at 19:24:17 UTC, IGotD- wrote:
> On Thursday, 12 November 2020 at 19:08:37 UTC, Gregor Mückl 
> wrote:
>> [...]
>
> The question is what "free" means here. If that part contains 
> GPL or LGPL parts then it might be even more useless than a 
> commercial license. You can always buy a commercial license if 
> you want to and if you think the price is fair and then you can 
> do what you want. GPL and LGPL puts restrictions on the 
> distribution including your product. What is usually the most 
> deterring is that you must open up your system for tampering 
> which is a no no for many products.
>
> D wins here as it is using the Boost license which is a huge 
> benefit.

I wrote "free (as in beer)" for a reason above. The basic .NET 
framework components don't contain anything that is licensed 
under the GPL/LGPL. It's all open source, but not copyleft. The 
MIT license is very liberal. You only need to reproduce the 
license text somewhere in your documentation and you're good.