Simple C# 8.0 pattern matching switch example

Patterns.Switch.Lib.cs

using System;

namespace Patterns.Switch.Lib
{
    public class GreetingService
    {
        public string GetGreeting(string? name)
        {
            var value = name switch
            {
                var s when (string.IsNullOrEmpty(s)) => "Who?",
                "Bruce" => GetFullGreeting("Good day,", name),
                "Buck" => GetFullGreeting("Howdy,", name),
                "David" => GetFullGreeting("Hello,", name),
                _ => GetFullGreeting("Hey,", name)
            };
            return value;
        }

        private string GetFullGreeting(string salutation, string? name)
        {
            var value = $"{salutation} {name}!";
            return value;
        }
    }
}