C# Frequently Asked Questions

The C# team posts answers to common questions and describes new language features

.NET Compiler Platform (“Roslyn”) for the Rest of Us

This post is brought to you by Beth Massi, a Program Manager on the Visual Studio team.
If you’ve been reading this blog I’m sure you know by now that the .NET Compiler Platform (code named “Roslyn”) is the next generation of the Visual Basic and C# .NET compilers.

Visual Studio “14” CTP Now Available

As announced today by Soma, we’ve just released the first CTP (Community Technology Preview) of the next version of Visual Studio. This is doubly-exciting as this is the first public release of a version of Visual Studio powered by “Roslyn” by default.

Edit and Continue survey results

Thanks everybody for all the great feedback!
We’ve received hundreds of replies since last week with detailed information and concrete examples for us to review. We are closing the survey today and have started to process the tons of data you have provided.
The overwhelming majority of you have told us that Edit and Continue is important and you’d like us to make it even better.

Help make Edit and Continue better!

UPDATE 2014-05-20: We’ve received enough responses and the survey is now closed. Thanks everyone!
Hey C# developers!
Do you get tired of seeing this box (I know I do)?

Tell us about it!
The Visual Studio team would like your anonymous feedback on improving Edit and Continue (E&C) when developing .NET applications.

Visualizing Roslyn Syntax Trees

Hello everyone! I hope you had a chance to catch the recent announcements around the .NET Compiler Platform (“Roslyn”). If not, I encourage you to view Anders’s presentation at Build 2014 (skip to 1:10:28). If you haven’t already, download the previews and take them for a spin!

Taking a tour of Roslyn

It’s a big day for us on the Managed Languages team! As announced at the //BUILD conference earlier today, and as posted by Soma on his blog, we are not just delivering a new preview of Roslyn to all of you,

Roslyn performance (Matt Gertz)

(For the next few posts, I’m going to introduce readers to the different feature teams in the Managed Languages org.  Today, I’m starting this with a focus on the performance team.)
Back in 2000, I found myself assigned to be the performance lead of the Visual Basic team,

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New C# T-Shirt Designs on the .NET Blog – Tell Us What You Think

[HTTP 301: Hey, just so you know, we’re posting on the .NET team blog now. Head over there for new content from the C# team and more. Below is an summary from my latest post]
Mads and Dustin showed off their cool VB and C# team t-shirts at BUILD and tons of people liked them and asked where they could get one.

Roslyn ships v1.0-rc2 with “Go-Live” license

For the last six years you’ve heard us go on and on about this Roslyn thing and how it’s the platform for the future and would change everything and that we were all-in on it and “it’s going to be great just wait and see”.

A Journey Through Open Source: The Trials & Triumphs in Roslyn’s First Year of Open Source

“I am looking for someone to share in an adventure.”
— Gandalf, The Hobbit, J.R.R. Tolkien

On April 3, 2014, Anders Hejlsberg set us on our open source journey when he made the .NET Compiler Platform (aka “Roslyn”) source code public live on stage in San Francisco.

Edit & Continue and Make Object ID Improvements in CTP 6

It’s the beginning of a new year! According to Back to the Future Part II, everyone will be riding hoverboards in a couple months (and, let’s be honest, Doc would love the HoloLens). In the meantime, let’s explore the enhancements we’ve made to the Visual Studio debugging experience.

We’re moving to GitHub!

It’s official. We’re moving to GitHub!
We are moving the Roslyn OSS code from CodePlex to GitHub. GitHub has a vibrant open source community that we want to actively be a part of and contribute to. We are also going to take this time to modify our pull request process.

Better together: C# 6 and the Visual Studio 2015 Debugger

“Lambdas! Lambdas! Lambdas! Lambdas! …”
If you hadn’t heard, Visual Studio 2015 will support the use of lambda expressions in the debugger windows.

We’re all very excited to deliver on this longstanding TOP customer request. When LINQ was introduced in 2008 it was a game changer for the way .NET developers think about and code with data.

New Features in C# 6

C# 6 is the version of C# that ships with VS 2015 Preview. The philosophy behind this version is straightforward: improve simple everyday coding scenarios, without adding much conceptual baggage. The features should make code lighter without making the language heavier.

Post-Release Goodies

The Rosetta lander Philae wasn’t the only thing in space last week. Our launch of Visual Studio 2015 Preview and our announcement to open source the full .NET server stack were out of this world. After all, it’s not every day that you can say your work trended higher than Kim Kardashian on Twitter.

Short Videos Demonstrating What’s New in Visual Studio 2015 Preview for C#, VB, and F#

Our team has put together a set of short videos to highlight some of our work in Visual Studio 2015 Preview. Check them out to learn more about what’s new in C# and VB, how F# can be good for enterprise,

Introducing the Visual Studio 2015 Preview for C# and VB

Download Visual Studio 2015 Preview and review the release notes.
Over the past several years, our team has been hard at work re-implementing the full language stacks for C# and Visual Basic. While this was a long investment, we knew that an improved stack with a cleaner architecture would allow our team to work faster,