UML praca domowa

using System;
using System.Collections.Generic;
using System.IO;

namespace Schemat_GUI
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }

    struct MousePosition
    {
        public int X { get; set; }
        public int Y { get; set; }

        MousePosition(int x, int y)
        {
            X = x;
            Y = y;
        }
    }

    interface IGUIElement
    {
        void Draw();
        void Click(MousePosition mousePosition);
    }

    class Logic
    {
        public void Run()
        {
            Button calculateMeanButton = new Button(MeanButtonClick);
            List<IGUIElement> elements = new List<IGUIElement> { calculateMeanButton };

            Menu mainMenu = new Menu(elements);

            while (mainMenu.GetIsOpen())
            {
                mainMenu.Draw();
                //if (mouse.IsClicked())
                //{
                //  mainMenu.Clikc(getMousePosition());
                //}
            }
        }

        private void MeanButtonClick()
        {
            double mean = Calculator.Mean(Calculator.Generate(10));
            File.WriteAllText("wynik.txt", mean.ToString());

            DisplayWindow display = new DisplayWindow(mean.ToString());
            display.Draw();
        }
    }

    class Menu : IGUIElement
    {
        private List<IGUIElement> elements;

        private bool isOpen = true;
        public bool GetIsOpen() { return isOpen; }

        public void Close() { isOpen = false; }
        public void Draw() { }
        public void Click(MousePosition mousePosition)
        {
            foreach (var element in elements)
            {
                element.Click(mousePosition);
            }
        }

        public Menu(List<IGUIElement> elements)
        {
            this.elements = elements;
        }
    }

    class Button : IGUIElement
    {
        Action onClick;

        public void Draw() { }
        public void Click(MousePosition mousePosition)
        {
            //if mousPositon is in buttonArea
            onClick();
        }

        public Button (Action onClick)
        {
            this.onClick = onClick;
        }
    }

    class DisplayWindow : IGUIElement
    {
        private string content;

        public void Click(MousePosition mousePosition)
        {
            // if close icon clicked
            Close();
        }

        public void Draw()
        {
            //Display content
        }

        public void Close() { }

        public DisplayWindow(string content)
        {
            this.content = content;
        }
    }

    class Calculator
    {
        public static List<int> Generate(int howMany)
        {
            List<int> randomNumbers = new List<int>(howMany);
            Random random = new Random();

            for (int i = 0; i < howMany; i++)
            {
                randomNumbers.Add(random.Next());
            }

            return randomNumbers;
        }

        public static int Sum(List<int> numbers)
        {
            int sum = 0;
            foreach (var number in numbers)
            {
                sum += number;
            }

            return sum;
        }

        public static double Mean(List<int> numbers)
        {
            return (double)Sum(numbers) / (double) numbers.Count;
        }
    }
}