CSharp 7.1

Async Main

Program.cs

// the following methods are now allowed entrypoints: static async Task Main() { } static async Task Main(string[] args) { } static async Task<int> Main() { } static async Task<int> Main(string[] args) { }

Target-typed "default" literal

int i = default(int); // is replaced by (its type is inferred by target-typing instead) int i = default;

Infer tuple names

list.Select(x => (P1: x.P1, P2: x.P2)); // is replaced by (tuple names are inferred) list.Select(x => (x.P1, x.P2));

Pattern-matching with generics

C# 7.0 Pattern matching