Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/2cJsQmk. Mads Torgersen discusses how C# is evolving, how the teams work in the open source space, and some of the future features and changes to the language (C# 7). Filmed at qconnewyork.com. Mads Torgersen leads the C# language design process at Microsoft, where he has been involved in five versions of C#, and also contributed to TypeScript, Visual Basic, Roslyn and LINQ. Before he joined Microsoft a decade ago, he worked as a university professor in Aarhus, Denmark, doing research into programming language design and contributing to Java generics.

2. InfoQ.com: News & Community Site
• 750,000 unique visitors/month
• Published in 4 languages (English, Chinese, Japanese and Brazilian
Portuguese)
• Post content from our QCon conferences
• News 15-20 / week
• Articles 3-4 / week
• Presentations (videos) 12-15 / week
• Interviews 2-3 / week
• Books 1 / month
Watch the video with slide
synchronization on InfoQ.com!
https://www.infoq.com/presentations/
chsarp-future

3. Presented at QCon New York
www.qconnewyork.com
Purpose of QCon
- to empower software development by facilitating the spread of
knowledge and innovation
Strategy
- practitioner-driven conference designed for YOU: influencers of
change and innovation in your teams
- speakers and topics driving the evolution and innovation
- connecting and catalyzing the influencers and innovators
Highlights
- attended by more than 12,000 delegates since 2007
- held in 9 cities worldwide

4. http://stackoverflow.com/research/developer-survey-2016#technology-most-popular-technologies

5. http://stackoverflow.com/research/developer-survey-2016#technology-most-loved-dreaded-and-wanted

7. Run on Windows
.NET as system component
Run on VM (CLR)
Black box compilers
Edit in Visual Studio
Proprietary
Run everywhere
Deploy with app
Compile to native
Open compiler APIs
Use your favorite editor
Open source

8. There should only need to be
one code base in the world
for understanding C#

11. ref PhysicalObject GetAsteroid(Position p)
{
int index = p.GetIndex();
return ref Objects[index];
}
ref var a = ref GetAsteroid(p);
a.Explode();

12. if (o is Point p && p.X == 5) { WriteLine($"Y: {p.Y}"); }
if (o is Point { X: var x, Y: var y } && x == 5) { WriteLine($"Y: {y}"); }
if (o is Point { X: 5, Y: var y }) { WriteLine($"Y: {y}"); }
if (o is Point(5, var y)) { WriteLine($"Y: {y}"); }

13. string? n; // Nullable reference type
string s; // Non-nullable reference type
n = null; // Sure; it's nullable
s = null; // Warning! Shouldn’t be null!
s = n; // Warning! Really!
WriteLine(s.Length); // Sure; it’s not null
WriteLine(n.Length); // Warning! Could be null!
if (n != null) { WriteLine(n.Length); } // Sure; you checked
WriteLine(n!.Length); // Ok, if you insist!

14. class Person : IEquatable<Person>
{
public string First { get; }
public string Last { get; }
public Person(string First, string Last) { this.First = First; this.Last = Last; }
public (string First, string Last) Deconstruct() => (First, Last);
public bool Equals(Person other)
=> other != null && First == other.First && Last == other.Last;
public override bool Equals(object obj) => obj is Person other ? Equals(other) : false;
public override int GetHashCode() => GreatHashFunction(First, Last);
…
}
class Person(string First, string Last);

17. Watch the video with slide synchronization on
InfoQ.com!
https://www.infoq.com/presentations/chsarp-
future