My point is that it's just hard to understand what exactly one means when they're writing ".Net". Do they mean the entire framework, a specific library, the CLR, one language, etc. For whatever reason, the name has a very contextual meaning, and people use them interchangeably (".Net Core" is clearly specific though).

Not that they're alone. Adobe did worse with "Flex" since it could refer to the compiler, a framework, and an editor at one point until they decided to make it a bit more standardized.