C#: How to detect arguments typed into console application?

static void Main(string[] args)
    {
        Console.WriteLine("Welcome To Food Hut");
        Console.ReadLine();

        // if readline equals to /help then display some help text.


        // if /food command is typed, read first argument after /food Pizza, -t TheTopping
        // and -p ForWhatToDrink

        // and then display, 'So you would like a Pizza with Pepperoni and Pepsi to drink?'
    }

static void Main(string[] args)
{
    Arguments cmdline = new Arguments(args);

    Console.WriteLine(cmdline["name"]);
}

string input = Console.ReadLine();
if (input == "/help") { }
else if (input.StartsWith("/food")) { }
else { //... }

Food:
1) Tofu
2) Tempeh
3) Seitan
4) Soup

Choice (1-4)? [users input]

Drink:
1) Pepsi
2) Coffee
3) Water
4) Tea
5) Juice

Choice (1-5)? [users input]

input = Console.ReadLine();
string[] commands = input.Split(' ');
if(commands[0] == "/food")
{
 if(commands[1] == "Pizza");
   .....
}