class Program
{
    static void Main(string[] args)
    {
        List<IUIElement> Buttons = new List<IUIElement>(new []{
            new Button(0, 0, 5, 5),
            new Button(19, 4, 7, 3),
        });

        Buttons[0].OnClick += () => Console.WriteLine("На кнопку кликнули");

        while (true)
        {
            Render(Buttons);
            CheckCollision(Input(), Buttons);
        }
    }

    static void CheckCollision(bool isClick, IEnumerable<IUIElement> elements)
    {
        foreach(var e in elements)
        {
            if(e.Contains(Console.CursorLeft, Console.CursorTop) && isClick)
            {
                e.Click();
            }
        }
    }

    static void Render(IEnumerable<IUIElement> elements)
    {
        int cx = Console.CursorLeft, cy = Console.CursorTop;

        foreach (var e in elements)
        {
            e.Render();
        }

        Console.SetCursorPosition(cx, cy);
    }

    static bool Input()
    {
        ConsoleKeyInfo k = Console.ReadKey(true);
        switch (k.Key)
        {
            case ConsoleKey.LeftArrow:
                Console.SetCursorPosition(Console.CursorLeft - 1, Console.CursorTop);
                break;
            case ConsoleKey.RightArrow:
                Console.SetCursorPosition(Console.CursorLeft + 1, Console.CursorTop);
                break;
            case ConsoleKey.DownArrow:
                Console.SetCursorPosition(Console.CursorLeft, Console.CursorTop + 1);
                break;
            case ConsoleKey.UpArrow:
                Console.SetCursorPosition(Console.CursorLeft, Console.CursorTop - 1);
                break;
        }

        return k.Key == ConsoleKey.Enter;
    }
}


public interface IUIElement
{
    event Action OnClick;
    void Click();
    void Render();
    bool Contains(int x, int y);
}

public class Button : IUIElement
{
    public int X, Y, Width, Height;
    public event Action OnClick;

    public Button(int x, int y, int width, int height)
    {
        X = x;
        Y = y;
        Width = width;
        Height = height;
    }

    public void Render()
    {

        Console.SetCursorPosition(X, Y);
        for(int x = 0; x < Width; x++)
        {
            for(int y = 0; y < Height; y++)
            {
                Console.SetCursorPosition(X + x, Y + y);
                Console.Write('#');
            }
        }
    }

    public bool Contains(int x, int y)
    {
        return x > X && x < (X + Width) && y > Y && y < (Y + Height);
    }

    public void Click()
    {
        if (OnClick != null)
        {
            OnClick();
        }
    }
}