example.cs

Dictionary<string, Event> events = new();

while (true)
{
	Console.Clear();
	Console.WriteLine("Menu...");
	Console.WriteLine("  1. Add an event");
	Console.WriteLine("  2. List all events");
	Console.WriteLine("  3. Exit");
	Console.WriteLine();
	switch (Console.ReadKey(true).Key)
	{
		case ConsoleKey.D1:
			{
				Console.WriteLine("Adding an event...");
				Event e = new();
				Console.Write("Enter event name: ");
				e.Name = Console.ReadLine()!;
				events.Add(e.Name, e);
				Console.WriteLine("Event added. Press any key to continue...");
				Console.ReadKey(true);
				break;
			}
		case ConsoleKey.D2:
			{
				Console.WriteLine("Listing events...");
				foreach (Event e in events.Values)
				{
					Console.WriteLine(e.Name);
				}
				Console.WriteLine("Press any key to continue...");
				Console.ReadKey(true);
				break;
			}
		case ConsoleKey.D3:
			return;
	}
}

class Event
{
	public string Name { get; set; }
	//public string Description { get; set; }
	//public DateTime Start { get; set; }
	//public DateTime End { get; set; }
}