Languages features in C# 6 and VB 14

  • Exists: Already shipped in previous release
  • Added: Implemented for this release
  • Planned: Intended for this release
  • No: Not intended for this release
  • N/A: Not meaningful for this language

Please note that everything is still subject to change - this is a preview after all. However, we are reasonably confident about the overall feature set at this point.

The VS2015 Preview has the following features. For a description of each feature see:
Feature Example C# VB
Auto-property initializers public int X { get; set; } = x; Added Exists
Getter-only auto-properties public int Y { get; } = y; Added Added
Ctor assignment to getter-only autoprops Y = 15 Added Added
Parameterless struct ctors Structure S : Sub New() : End Sub : End Structure Added Added
Using static members using System.Console; … Write(4); Added Exists
Dictionary initializer new JObject { ["x"] = 3, ["y"] = 7 } Added No
Await in catch/finally try … catch { await … } finally { await … } Added No
Exception filters catch(E e) if (e.Count > 5) { … } Added Exists
Partial modules Partial Module M1 N/A Added
Partial interfaces Partial Interface I1 Exists Added
Multiline string literals "Hello<newline>World" Exists Added
Year-first date literals Dim d = #2014-04-03# N/A Added
Line continuation comments Dim addrs = From c in Customers ' comment N/A Added
TypeOf IsNot If TypeOf x IsNot Customer Then … N/A Added
Expression-bodied members public double Dist => Sqrt(X * X + Y * Y); Added No
Null propagation customer?.Orders?[5]?.$price Added Added
String interpolation $"{p.First} {p.Last} is {p.Age} years old." Added* Planned
nameof operator string s = nameof(Console.Write); Added* Planned
#pragma #Disable Warning BC40008 Added Added
Smart name resolution N/A Added
ReadWrite props can implement ReadOnly Exists Added
#region inside methods Exists Added
Overloads inferred from Overrides N/A Added
CObj in attributes Exists Added
CRef and parameter name Exists Added
Extension Add in collection initializers Added Exists
Improved overload resolution Added N/A


*Design changes expected

Last edited Nov 12 at 4:55 PM by madst, version 39