The only feature I'm seeing in that list that didn't exist in some other language 10 years or more before it did in C# is LINQ, and I'm only willing to give tha

The only feature I'm seeing in that list that didn't exist in some other language 10 years or more before it did in C# is LINQ, and I'm only willing to give that one half a point; it's essentially syntactic sugar for the standard functional sequence operations.