To start tinkering with Roslyn you will need the following NuGet packages:

• The C# and VB compilers - Microsoft.Net.Compilers. To install it you can run the following command in the Package Manager Console:

  nuget install Microsoft.Net.Compilers

• The Language APIs and Services - Microsoft.CodeAnalysis. To install it you can run the following command in the Package Manager Console:

  nuget install Microsoft.CodeAnalysis

Additionally it is a good to install the .NET Compiler Platform SDK Templates, that can be found here. This will get you:

• Templates for both C# and Visual Basic that enable the creation of Analyzers, CodeFixes and stand-alone analysis tools.
• The Syntax Visualizer tool for Visual Studio(View -> Other Windows -> Syntax Visualizer), which is extremely usefully for examining the syntax tree of existing code.

• The Roslyn Quoter

A tool for converting an sample C# program to syntax tree API calls. The tool itself can be found here.

• Enhanced source viewer

An easy way to view the Roslyn source code can be found here.