Terminology : What is C#, C#.Net and C#.Net Framework?

Terminology : What is C#, C#.Net and C#.Net Framework?

I'm a bit of a newbie in C# still, and I was wondering what elements
pertain uniquely to C# and what elements are unique to the .Net Framework.
Are the keywords, operators, compiler, compiler errors and preprocessor
directives the only members of C# itself? Does C# have any other members,
or are some of the previous members attributed to the .Net Framwork?
In addition, in a Console Application, do the following namespaces used to
contain .Net Framework members?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;