C#+ is a catch-all name for the layers of frameworks that make up an advanced language like C#+.  Via the image shown, here are the layers in detail from bottom to top:

1: CPU layer - this layer is an exact replica of the commands the CPU accepts and responds to.

2: Universal CPU layer - this layer covers all the commands that CPUs are required to have in order to be a modern CPU.  Variables, functions, ifs, jumps, math, compares, conversions, loops, ands/nots/ors/etc.  All these are implemented in this layer.

3: Universal Object-oriented layer - this layer covers everything a modern OO language has: classes, properties, events.  This is along with all the commands from the universal CPU layer.

4: Human-readable C#+/C#/C++/VB/Python layer - this layer is the only human-readable text layer that's basically the same as layer 3, just in text form.

All these layers can downgrade so if someone is writing in layer 4, they can go all the way down to the CPU level and write code that runs right at the metal.

How does all this help?  #1 by getting rid of quasi-OO languages like SQL and Javascript.  Browsers and databases would understand layer 3 so coders could use their favorite layer 4 language to talk to databases, browsers, and OS's.  #2 by implementing XML into languages like C#, we can greatly simplify serialization and get rid of languages like HTML and XAML.C#+ is