C# Key Problem

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace GameEdition3
{
    class Data
    {
        private string strInstructions;
        private string strTitleMenu;
        public string result = String.Empty;

   public string Information()
        {
           strInstructions = "Instructions: \n \n" +
           "Press 1 on your keyboard to add an item to your inventory \nPress 2 on your keyboard to Display All Items. \nPress 3 on your keyboard to choose a random Item \nPress 4 to exit the program"
            + " \n \nPress Backspace to go back to the menu";
           return strInstructions;
        }

        public string TitleMenu()
       {
        strTitleMenu = "1. Add New Item\n2. Display All Items \n3. Random Item \n4. Quit " +
            "\nPress I for instructions";
        return strTitleMenu;
       }

        public string myFunction()
        {

            string input = Console.ReadLine();
            switch (input)
            {

                case "Warhammer":
                    result = "Warhammer";
                    return "Warhammer is selected";

                case "Heavy Armor":
                    result = "Heavy Armor";
                    return "Heavy Armor is selected";

                case "Boots":
                    result = "Boots";
                    return "Boots is selected";

                case "Sword":
                    result = "Sword";
                    return "Sword is selected";

                default:
                    return "Input not reconized, please choose another item";
            }
       }

    public Data()
        { }
    }
}