C#compiler

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Compilers - Managed Profile-Guided Optimization Using Background JIT

https://msdn.microsoft.com/magazine/mt683795

C# and Visual Basic - Use Roslyn to Write a Live Code Analyzer for Your API

https://msdn.microsoft.com/en-us/magazine/dn879356

C# - Adding a Code Fix to Your Roslyn Analyzer

https://msdn.microsoft.com/en-us/magazine/dn904670.aspx

https://github.com/dotnet/roslyn/wiki/Syntax%20Visualizer

https://github.com/dotnet/roslyn/wiki/How-To-Write-a-C%23-Analyzer-and-Code-Fix

Source code

Clone the sources:

git clone https://github.com/dotnet/roslyn.git[/code] 
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Building, testing and debugging the sources

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Tutorial articles by Alex Turner in MSDN Magazine

Use Roslyn to Write a Live Code Analyzer for Your API

Adding a Code Fix to your Roslyn Analyzer

Roslyn Overview

API Changes between CTP 6 and RC

Samples and Walkthroughs

Documentation

Analyzer documentation

Syntax Visualizer Tool

Roadmap

Language Feature Status

Language Design Notes

FAQ

Also take a look at our Wiki for more information on how to contribute, what the labels on issue mean, etc.

https://github.com/dotnet/roslyn/wiki/FAQ

https://github.com/dotnet/roslyn/wiki/Roslyn%20Overview

https://blogs.msdn.microsoft.com/csharpfaq/2014/04/03/taking-a-tour-of-roslyn/

https://blogs.msdn.microsoft.com/csharpfaq/2014/04/17/visualizing-roslyn-syntax-trees/

http://www.pascal-programming.info/lesson2.php

debugging roslyn

https://github.com/dotnet/roslyn/blob/master/docs/contributing/Building,%20Debugging,%20and%20Testing%20on%20Windows.md