C# 7.0

Highlights

• Tuples with named elements: (int sum, int count) Foo()
• Deconstruction: var (x, y) = point;
• Pattern matching (is, switch): type, constant, and var patterns
• Out variables: int.TryParse(s, out var value)
• Local functions: Nested helper methods with lexical scope
• Ref returns and locals: Return by reference to avoid copies
• Throw expressions: x ?? throw new ArgumentNullException(nameof(x))
• Digit separators and binary literals: 1_000_000, 0b1010_1010