1. Future of C#
Umamaheswaran
@UMW1990

2. Stack Overflow – most popular technologies

3. Stack Overflow – most loved technologies

4. .NET Language Strategy 1,000,000’s C# 100,000’s VB 10,000’s F#
Millions VB
100,000’s
Hundreds of thousands F#
10,000’s
Tens of thousands

5. C#: The road ahead C# 7.0 It’s there use it C# 7.1
First point release – tiny features
C# 7.2
Safe efficient low level code
C# 7.3
Next steps for pattern matching
C# 8.0
Major features

6. C# 8.0 Async streams and disposables
IAsyncEnumerable<Person> people = database.GetPeopleAsync();
foreach await (var p in people) { … }
using await (IAsyncDisposable resource = await store.GetRecordAsync(…)) { … }

7. C# 8.0 extension everything
extension Enrollee extends Person {
// static field
static Dictionary<Person, Professor> enrollees = new Dictionary<Person, Professor>();
// instance method
public void Enroll(Professor supervisor) { enrollees[this] = supervisor; }
// instance property
public Professor Supervisor => enrollees.TryGetValue(this, out var supervisor) ? supervisor : null;
// static property
public static ICollection<Person> Students => enrollees.Keys;
// instance constructor
public Person(string name, Professor supervisor) : this(name) { this.Enroll(supervisor); } }

8. C# 8.0 Records class Person(string First, string Last);
class Person : IEquatable<Person> {
public string First { get; }
public string Last { get; }
public Person(string First, string Last) => (this.First, this.Last) = (First, Last);
public void Deconstruct(out string First, out string Last)
=> (First, Last) = (this.First, this.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); … }

9. Resources Language strategy C# design Roslyn
blogs.msdn.microsoft.com/dotnet/2017/02/01/the-net-language-strategy/
blogs.msdn.microsoft.com/vbteam/2017/02/01/digging-deeper-into-the-visual-basic-language-strategy/
C# design
github.com/dotnet/csharplang
blogs.msdn.microsoft.com/dotnet/2017/03/09/new-features-in-c-7-0/
Roslyn
github.com/dotnet/roslyn

10. Thank you