static void Main(string[] args)
{
var availableCommands = GetAvailableCommands();
if(args.Length == 0)
{
PrintUsage(availableCommands);
return;
}
var parser = new CommandParser(availableCommands);
var command = parser.ParseCommand(args);
//Removed the null check because introduced the logic of returning the NullCommand object if the command is invalid
//if (command != null)
command.Execute();
}