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.

Visual Studio 2015 RC 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
Read-only auto-properties	`public int Y { get; } = y;`	Added	Added
Ctor assignment to getter-only autoprops	`Y = 15`	Added	Added
Static imports	`using static System.Console; … Write(4);`	Added	Exists
Index initializer	`new JObject { ["x"] = 3 }`	Added	No
Await in catch/finally	`try … catch { await … } finally { await … }`	Added	No
Exception filters	`catch(E e) when (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
Comments after implicit line continuation	`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-conditional operators	`customer?.Orders?[5]`	Added	Added
String interpolation	`$"{p.Name} is {p.Age} years old."`	Added	Added
nameof operator	`string s = nameof(Console.Write);`	Added	Added
#pragma	`#Disable Warning BC40008`	Added	Added
Smart name resolution		N/A	Added
Read-write props can implement read-only interface properties		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