New C# 7.0 features in Visual Studio "15" Preview 4

Over the past couple of previews, new C# language features have been trickling in, but Preview 4 marks a point where the majority of C# 7.0 are now available. Here's a code sample that uses a good number of these features, and that works in Preview 4 today: For a full write-up about tuples, deconstruction, pattern matching, local functions, and the rest of C# 7.0, head over to the .NET Blog.