C# 7 does allow one to shorten that class a bit further. I saw this trick in the MEAP[0] of C# in Depth.

    public class TestClass
    {
        public int X { get; }
        public string Y { get; }
        public Guid Z { get; }

        public TestClass(int x, string y, Guid z) => (X, Y, Z) = (x, y, z);
    }

Disclaimer: I don't combine expression-bodied constructors and tuple construction/deconstruction in my code. I will use either feature but the combination seems likely to annoy my coworkers. I also haven't measured the costs of this idiom.

[0] https://www.manning.com/books/c-sharp-in-depth-fourth-editio...