Rehber C# ile Windows tema rengine duyarlı yazılım geliştirme

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace WindowsAccentColors_TS{
    public class ExtLibrary{
        // EXTERN METHODS
        // NOT: UXTHEME.DLL dosyası Windows 10 ve 11'de mevcuttur.
        // ============================================================================
        [DllImport("uxtheme.dll", EntryPoint = "#95")]
        private static extern uint GetImmersiveColorFromColorSetEx(uint dwImmersiveColorSet, uint dwImmersiveColorType, bool bIgnoreHighContrast, uint dwHighContrastCacheMode);
        [DllImport("uxtheme.dll", EntryPoint = "#96")]
        private static extern uint GetImmersiveColorTypeFromName(IntPtr pName);
        [DllImport("uxtheme.dll", EntryPoint = "#98")]
        private static extern int GetImmersiveUserColorSetPreference(bool bForceCheckRegistry, bool bSkipCheckOnFail);
        // PUBLIC METHODS
        // ============================================================================
        public static Color GetAccentColor(){
            var userColorSet = GetImmersiveUserColorSetPreference(false, false);
            var colorType = GetImmersiveColorTypeFromName(Marshal.StringToHGlobalUni("ImmersiveStartSelectionBackground"));
            var colorSetEx = GetImmersiveColorFromColorSetEx((uint)userColorSet, colorType, false, 0);
            return ConvertDWordColorToRGB(colorSetEx);
        }
        // PRIVATE METHODS
        // ============================================================================
        private static Color ConvertDWordColorToRGB(uint colorSetEx){
            byte redColor = (byte)((0x000000FF & colorSetEx) >> 0);
            byte greenColor = (byte)((0x0000FF00 & colorSetEx) >> 8);
            byte blueColor = (byte)((0x00FF0000 & colorSetEx) >> 16);
            return Color.FromArgb(redColor, greenColor, blueColor);
        }
    }
}

private UserPreferenceChangedEventHandler UserPreferenceChanged;

public Form1(){
            InitializeComponent();
            LoadThemes();
            UserPreferenceChanged = new UserPreferenceChangedEventHandler(SystemEvents_UserPreferenceChanged);
            SystemEvents.UserPreferenceChanged += UserPreferenceChanged;
            this.Disposed += new EventHandler(Form_Disposed);
        }

private void LoadThemes(){
            var themeColor = ExtLibrary.GetAccentColor();// WINDOWS TEMA RENGI == OLUŞTURDUĞUNUZ CLASS ISMI NE ISE BURAYI O ISIM ILE DEGISTIRIN.
            var lightColor = ControlPaint.Light(themeColor);
            var darkColor = ControlPaint.Dark(themeColor);
            panel1.BackColor = themeColor;
            button1.BackColor = darkColor;
            // BUTTONS
            // ============================================================================
            foreach (Button button in this.Controls.OfType<Button>()){
                button.BackColor = themeColor;
            }
            foreach (Button button in this.panel1.Controls.OfType<Button>()){
                button.FlatAppearance.MouseOverBackColor = themeColor;
                button.FlatAppearance.MouseDownBackColor = lightColor;
            }
        }

  private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e){
            if (e.Category == UserPreferenceCategory.General || e.Category == UserPreferenceCategory.VisualStyle){
                LoadThemes();
            }
        }
        private void Form_Disposed(object sender, EventArgs e){
            SystemEvents.UserPreferenceChanged -= UserPreferenceChanged;
        }