Crash when class write to console

Question

I'm going to get another user and enter which month he wants and find the quarter.

Thought of writing the code inside a class as I need more training on how to use classes.

The program asks whose month it is and I can enter. But now when I type "January" only programs crash.

I assume that it should show which quarter "january" is in

namespace ConsoleApp1
{
internal class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Write a month");
        
        var mc = new MyClass();
        mc.month = Convert.ToString(Console.ReadLine());
    }
    public class MyClass
    {
        public string month;

        public string Prop
        {
            get
            {
                return month;
            }
            set
                { if (Prop == "january")
                {
                    Console.WriteLine("1.quarter");
                }
            }
        }
    }
  }
}

Answer 1

Consider presenting a menu which in the case below uses a NuGet package Spectre.Console and docs. This gives you an opportunity to work with classes and ensures, in this case input is a valid month along with reties and how to exit.

First a class for the menu.

public class MonthItem
{
    public int Index { get; }
    public string Name { get; }

    public MonthItem(int index, string name)
    {
        Index = index;
        Name = name;
    }

    public override string ToString() => Name;
}

Class which creates the menu

class MenuOperations
{

    public static SelectionPrompt<MonthItem> SelectionPrompt()
    {
        var menuItemList = Enumerable.Range(1, 12).Select((index) =>
            new MonthItem(index, DateTimeFormatInfo.CurrentInfo.GetMonthName(index)))
            .ToList();

        menuItemList.Add(new MonthItem(-1, "Exit"));

        SelectionPrompt<MonthItem> menu = new()
        {
            HighlightStyle = new Style(Color.Black, Color.White, Decoration.None)
        };

        menu.Title("[yellow]Select a month[/]");
        menu.PageSize = 14;
        menu.AddChoices(menuItemList);

        return menu;

    }
}

Present menu, get selection and show details or exit.

static void Main(string[] args)
{
    while (true)
    {
        Console.Clear();

        var menuItem = AnsiConsole.Prompt(MenuOperations.SelectionPrompt());
        if (menuItem.Index != -1)
        {
            AnsiConsole.MarkupLine($"[b]{menuItem.Name}[/] index is [b]{menuItem.Index}[/]");
            Console.ReadLine();
        }
        else
        {
            return;
        }
    }
}