the future of c# kevin pilch-bisson kevinpi@microsoft.com mads torgersen...

THE FUTURE OF C#

KEVIN PILCH-BISSON

kevinpi@microsoft.com

MADS TORGERSEN

mads.torgersen@microsoft.com

PROJECT ROSLYN

A reimplementation of C# and VB compilers

In C# and VB

With rich public APIs

On CodePlex

The .NET compiler platform

WHY ROSLYN?

TeamClean architecture to evolve on

PartnersSource-based tools and extensions

DevelopersRicher C# IDE experience

OSS

1,000,000s

1,000s

10s

ROSLYN DEMO

Rich IDE experiences

Custom diagnostics

New language features

RICH IDE EXPERIENCES

Inline Rename with conflict detection

More refactorings: Introduce local Inline temp

Lightbulbs to quickly fix up your code

Small improvements throughout: Colorization in quick info, signature help, outlining tooltips Smarter case matching in Completion

CUSTOM DIAGNOSTICS

Easily detect common coding problems

Run live in the IDE

Can attach “quick fixes” to them as well

Run as part of command line/team builds

Distribute together with a library on NuGet

LANGUAGE FEATURESUsing static members using System.Console; … Write(4);

Primary Constructors class Point(int x, int y) { … }

Auto-property Initializers public int X { get; set; } = x;

Getter-only auto-properties

public int Y { get; } = y;

Index initializers new JObject { ["x"] = 3, ["y"] = 4 }

Declaration Expressions int.TryParse(s, out var x);

Await in catch/finally try { … } catch { await … } finally { await … }

Exception Filters catch (E e) if (e.Count == 0) { }

Null Propagation Operator customer?.Orders?[5].Price

CALL TO ACTION

Use the IDE and language features

Dip your toes in custom diagnostics

Consider forking the compiler source

Give us feedback

ROSLYN, C# AND VB RESOURCES

MSDN - http://www.msdn.com/roslyn

Roslyn Preview for VS 2013 - http://aka.ms/Roslyn

Download VS “14” CTP - http://www.visualstudio.com/en-us/downloads/visual-studio-14-ctp-vs

CodePlex - http://roslyn.codeplex.com

Roslyn source browser - http://source.roslyn.codeplex.com