Onward and Upward

Blog archive

New Update of 'Roslyn' CTP Available

An update of the "Roslyn" Community Technology Preview (CTP) has been released, Microsoft announced.

The September CTP features a host of new language features and a number of API changes. Microsoft warns that there are "known issues" with the CTP, and that only a subset of the C# and VB languages are included. The APIs that have been updated include the Compiler, Services and Editor Services APIs.

This is the third revision of the compiler-as-a-service project; it was previously updated in June, and was first released publicly to developers in October 2011.

Roslyn is a project to rewrite the C# and VB compilers in those languages; currently, they're written in C++. At the same time, the compiler is "opened up," instead of being a closed system, as in the past. As Visual Studio Magazine contributing editor Joe Kunk recently wrote, "Roslyn exposes information regarding source code parsing (what elements are present in code), semantic analysis (what they mean), binding (how they relate to each other), and IL emitting (executable code)."

VB developers may be disappointed to learn that the September CTP still doesn't support the "Interactive window", which is a popup window that allows immediate evaluation and testing of code snippets. Microsoft says, however, that VB support is coming in a future release.

Note that there are several requirements for running Roslyn. The most important is that the September CTP must be run on Visual Studio 2012; it won't work on Visual Studio 2010 or earlier. The supported operating systems are Windows 7, Windows 8, Windows Server 2008 R2 and Windows Server 2012.

Microsoft also states that the June CTP doesn't need to be un-installed before installing the September CTP.


Posted by Keith Ward on 09/19/2012 at 1:15 PM

comments powered by Disqus


  • Purple Blue Nebula Graphic

    How to Compute Disorder for Machine Learning Decision Trees Using C#

    Using a decision tree classifier from a machine learning library is often awkward because it usually must be customized and library decision trees have many complex supporting functions, says resident data scientist Dr. James McCaffrey, so when he needs a decision tree classifier, he always creates one from scratch. Here's how.

  • Blazor's Future: gRPC Is Key

    Blazor guru Steve Sanderson detailed what Microsoft is thinking about the future of the revolutionary project that enables .NET-based web development using C# instead of JavaScript, explaining how gRPC is key, along with a new way of testing and a scheme for installable desktop apps.

  • Don't Do It All Yourself: Exploiting gRPC Well Known Types in .NET Core

    If you're creating business services that send dates and decimal data then you may be concerned that gRPC services don't support the relevant data types. Don't Panic! There are solutions. Here's how to use them.

  • Sign

    Microsoft Points Blazor to Native Mobile Apps

    Blazor, the red-hot Microsoft project that lets .NET developers use C# for web development instead of JavaScript, is now being pointed toward the mobile realm, targeting native iOS and Android apps.

  • Circl

    Implementing State in .NET Core gRPC Messages with oneof

    In the real world, you've been dealing with the State pattern every time you designed a set of database tables. The Protocol Buffers specification lets you do the same thing when you define the messages you send and receive from your gRPC Web Service.

.NET Insight

Sign up for our newsletter.

Terms and Privacy Policy consent

I agree to this site's Privacy Policy.

Upcoming Events