1using System;
 2using System.Collections.Generic;
 3
 4namespace SyntaxZoo
 5{
 6    // Single-line comment
 7    /*
 8       Multi-line comment
 9    */
10
11    [Obsolete("This class is for syntax highlighting demo only.")]
12    public class Demo<T> where T : class
13    {
14        private readonly int _number = 42;
15        private string _text = "Hello, World!";
16        private char _letter = 'A';
17        private double _pi = 3.14159;
18
19        public delegate void LogHandler(string message);
20
21        public event LogHandler OnLog;
22
23        public Demo()
24        {
25            // Verbatim string
26            _text = @"Line1Line2\tTabbed";
27        }
28
29        public void RunExample()
30        {
31            try
32            {
33                var list = new List<T>();
34                list.Add(default);
35
36                for (int i = 0; i < _number; i++)
37                {
38                    if (i % 2 == 0)
39                    {
40                        Console.WriteLine($"{_text} Iteration #{i}");
41                    }
42                    else
43                    {
44                        Console.WriteLine("Odd number: " + i.ToString());
45                    }
46                }
47
48                OnLog?.Invoke("Finished loop");
49            }
50            catch (Exception ex)
51            {
52                Console.Error.WriteLine($"Error: {ex.Message}");
53                throw;
54            }
55            finally
56            {
57                Console.WriteLine("Demo complete.");
58            }
59        }
60    }
61
62    public static class Program
63    {
64        public static void Main()
65        {
66            var demo = new Demo<object>();
67            demo.OnLog += (msg) => Console.WriteLine("[LOG] " + msg);
68            demo.RunExample();
69        }
70    }
71}