LRN Quick Tip: Bridging Visual Studio and Roslyn

Today I was working on a sample Visual Studio extension and I had the following question:

Given a Visual Studio ITextSnapshot or ITextBuffer how can I get the corresponding Roslyn Document?

It turns out there’s a bunch of extension methods that make this easy. They’re not shipped with the Microsoft.CodeAnalysis NuGet package so you’ll need to pull them down manually:

1. Install the EditorFeatures NuGet package:
   Install-Package Microsoft.CodeAnalysis.EditorFeatures.Text
2. Include the appropriate a using statement:
   using Microsoft.CodeAnalysis.Text;

Now you’ll be able to map from ITextBuffer and ITextSnapshot back to Roslyn’s Document, SourceText and Workspace objects.