This document summarizes the new features in C# 6, including using static, automatic property initializers, expression bodied members, nameof operator, exception filters, and dictionary initializer. It discusses how the C# and VB.NET compilers were rewritten in managed code as part of Roslyn to expose compiler interfaces and support open-sourcing on GitHub. Some planned features like primary constructors and declaration expressions did not make the final release.

1. What’s New inC#6
Dmitri Nesteruk
@dnesteruk
skype: dmitri.nesteruk

2. Retrospective
C#1(Jan 2002)
C#2 Generics
C#3 LINQ
C#4 Dynamic
C#5 Async/await
C#6 Roslyn

3. Compiler as a Service
C#/VB.NET compiler re-written in managed code
Expose compiler interfaces
Open-source https://github.com/dotnet/roslyn
No bundled metaprogramming (build it yourself)

4. C#6 Features
Using static
Automatic property initializers
Expression bodied members
Nameof
Exception filters
Dictionary initializer

5. Minor Features
Await in catch/finally
Parameterless struct constructors
Add() as an extension method on collections
Overload improvements (e.g. w.r.t nullable)

6. Did Not Make It
Primary constructors
public struct Money(string currency, decimal amount)
{
public string Currency { get; } = currency;
public decimal Amount { get; } = amount;
}
Declaration expressions
return int.TryParse(input, out var result) ? result : 0;

7. That’s It!
Questions?
@dnesteruk