task26

using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        Dictionary<string, string> persons = new Dictionary<string, string>();

        string choose;
        bool isRun = true;
        while (isRun)
        {
            Console.WriteLine("\nInput number of action : ");
            Console.WriteLine("1. Add case.\n" +
                              "2. Output all cases.\n" +
                              "3. Remove case.\n" +
                              "4. Exit.");

            choose = Console.ReadLine();
            switch (choose)
            {
                case "1":
                    AddCase(persons);
                    break;
                case "2":
                    OutputCases(persons);
                    break;
                case "3":
                    RemoveCase(persons);
                    break;
                case "4":
                    isRun = false;
                    break;
                default:
                    Console.WriteLine("You write wrong number of command.");
                    break;
            }
        }
    }

    public static void AddCase(Dictionary<string, string> persons)
    {
        string name;
        string position;
        Console.WriteLine("Input name of person : ");
        name = Console.ReadLine();
        Console.WriteLine("Input position of person : ");
        position = Console.ReadLine();
        persons.Add(name, position);
    }

    public static void OutputCases(Dictionary<string, string> persons)
    {
        int i = 1;
        foreach (KeyValuePair<string, string> person in persons)
        {
            Console.Write($"{i}. {person.Key} - {person.Value} ");
            ++i;
        }
        Console.WriteLine();
    }

    public static void RemoveCase(Dictionary<string, string> persons)
    {
        if (persons.Count != 0)
        {
            string personName;
            bool isInput = true;

            do
            {
                Console.WriteLine($"Amount of cases : {persons.Count}");
                Console.WriteLine("Please type a name of person : ");
                personName = Console.ReadLine();
                if (persons.ContainsKey(personName))
                    isInput = false;
            } while (isInput);

            persons.Remove(personName);
        }
    }
}