ControlGUI/GUI/Roulette.cs

using GUI.Properties;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GUI
{
    public partial class Roulette : Panel
    {
        float degree;

        public float Degree
        {
            get => degree;
            set
            {
                degree = value % 360;
                var bkup = BackgroundImage;
                BackgroundImage = rotateImage(sourceImage, degree);
                bkup?.Dispose();
            }
        }

        Bitmap sourceImage;

        public Roulette()
        {
            sourceImage = new(Resources.Roulette);
            Degree = 0;
            DoubleBuffered = true;
        }

        static Bitmap rotateImage(Bitmap b, float angle)
        {
            Bitmap returnBitmap = new Bitmap(b.Width, b.Height);
            Graphics g = Graphics.FromImage(returnBitmap);
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
            g.TranslateTransform((float)b.Width / 2, (float)b.Height / 2);
            g.RotateTransform(360 - angle);
            g.TranslateTransform(-(float)b.Width / 2, -(float)b.Height / 2);
            g.DrawImage(b, new Point(0, 0));
            g.Dispose();
            return returnBitmap;
        }
    }
}