Generate an image source that can be used to give an image to the application dynamically.

CustomIconHelper.cs

using System;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using SamNolan.Emoji.WPF; //Remeber to get this from nuget

public static class CustomIconHelper
{
    public static ImageSource CreateCustomIcon(Color ledColor, double reflectionOpacity = 0, string imageResourceName = "")
    {
        int iconSize = 64;
        double circleSize = iconSize - 10;
        Color reflectionColor = Colors.White; // Change this to the desired reflection color

        // Create a DrawingVisual
        DrawingVisual drawingVisual = new DrawingVisual();

        using (DrawingContext drawingContext = drawingVisual.RenderOpen())
        {
            // Draw the bezel
            SolidColorBrush bezelBrush = new SolidColorBrush(Colors.White);
            Pen bezelPen = new Pen(new SolidColorBrush(Colors.Gray), 2);
            drawingContext.DrawEllipse(bezelBrush, bezelPen, new Point(iconSize / 2, iconSize / 2), circleSize / 2 + 5, circleSize / 2 + 5);

            // Draw the LED background
            SolidColorBrush ledBrush = new SolidColorBrush(ledColor);
            drawingContext.DrawEllipse(ledBrush, null, new Point(iconSize / 2, iconSize / 2), circleSize / 2, circleSize / 2);

            if (!string.IsNullOrEmpty(imageResourceName))
            {
                // Draw the reflection ellipse
                SolidColorBrush reflectionBrush = new SolidColorBrush(reflectionColor);
                reflectionBrush.Opacity = reflectionOpacity; // Use the passed opacity directly
                double reflectionEllipseSize = circleSize / 3; // Adjust the size of the reflection ellipse
                drawingContext.DrawEllipse(reflectionBrush, null, new Point(iconSize / 6, iconSize / 6), reflectionEllipseSize / 2, reflectionEllipseSize / 2);

                // Load the image overlay resource
                ImageSource imageOverlay = LoadImageFromResource(imageResourceName);

                if (imageOverlay != null)
                {
                    // Draw the image overlay
                    drawingContext.DrawImage(imageOverlay, new Rect(0, 0, iconSize, iconSize));
                }
                else
                {
                    // Draw the application's default icon as fallback
                    drawingContext.DrawImage(Application.Current.MainWindow.Icon, new Rect(0, 0, iconSize, iconSize));
                }
            }
        }

        // Render the DrawingVisual to a RenderTargetBitmap
        RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(
            iconSize, iconSize, // Width, Height
            96, 96,             // DPI (dots per inch)
            PixelFormats.Pbgra32
        );

        renderTargetBitmap.Render(drawingVisual);

        // Convert RenderTargetBitmap to BitmapImage
        BitmapImage bitmapImage = new BitmapImage();
        using (var stream = new MemoryStream())
        {
            BitmapEncoder encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
            encoder.Save(stream);
            stream.Seek(0, SeekOrigin.Begin);

            bitmapImage.BeginInit();
            bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
            bitmapImage.StreamSource = stream;
            bitmapImage.EndInit();
        }

        return bitmapImage;
    }

    public static ImageSource CreateEmojiIcon(string emojiUnicode, double reflectionOpacity = 0, string imageResourceName = "")
    {
        int iconSize = 64;
        double circleSize = iconSize - 10;

        // Create a DrawingVisual
        DrawingVisual drawingVisual = new DrawingVisual();

        using (DrawingContext drawingContext = drawingVisual.RenderOpen())
        {
            // Draw the bezel
            SolidColorBrush bezelBrush = new SolidColorBrush(Colors.White);
            Pen bezelPen = new Pen(new SolidColorBrush(Colors.Gray), 2);
            drawingContext.DrawEllipse(bezelBrush, bezelPen, new Point(iconSize / 2, iconSize / 2), circleSize / 2 + 5, circleSize / 2 + 5);

            // Draw the LED background with the emoji icon
            var emoji = Emoji.GetEmoji(emojiUnicode);
            if (emoji != null)
            {
                drawingContext.DrawText(
                    new FormattedText(emoji.GetUnicodeString(), System.Globalization.CultureInfo.InvariantCulture,
                        FlowDirection.LeftToRight, new Typeface("Segoe UI Emoji"), 32, Brushes.Black), new Point(10, 10));
            }

            // Draw the reflection ellipse (if applicable)

            // Load the image overlay resource (if applicable)

            // Draw the image overlay (if applicable)
        }

        // Render the DrawingVisual to a RenderTargetBitmap
        RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(
            iconSize, iconSize, // Width, Height
            96, 96,             // DPI (dots per inch)
            PixelFormats.Pbgra32
        );

        renderTargetBitmap.Render(drawingVisual);

        // Convert RenderTargetBitmap to BitmapImage
        BitmapImage bitmapImage = new BitmapImage();
        using (var stream = new MemoryStream())
        {
            BitmapEncoder encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
            encoder.Save(stream);
            stream.Seek(0, SeekOrigin.Begin);

            bitmapImage.BeginInit();
            bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
            bitmapImage.StreamSource = stream;
            bitmapImage.EndInit();
        }

        return bitmapImage;
    }

    private static ImageSource LoadImageFromResource(string resourceName)
    {
        try
        {
            var uri = new Uri($"pack://application:,,,/YourProjectName;component/{resourceName}");
            var source = new BitmapImage(uri);
            source.Freeze();
            return source;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error loading image '{resourceName}': {ex.Message}");
            return null;
        }
    }
}