sort a folder of jpgs based on similarity to a given image in csharp

main.cs
Bitmap givenImage = new Bitmap("path/to/given/image.jpg");
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main.cs
string folderPath = "path/to/folder/";
string[] jpgFiles = Directory.GetFiles(folderPath, "*.jpg");

List<Bitmap> images = new List<Bitmap>();

foreach(string filePath in jpgFiles) {
    Bitmap image = new Bitmap(filePath);
    images.Add(image);
}
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main.cs
double ComputeMSE(Bitmap image1, Bitmap image2) {
    if (image1.Width != image2.Width || image1.Height != image2.Height)
        throw new ArgumentException("Images must have the same dimensions");

    double mse = 0.0;

    for (int i = 0; i < image1.Width; i++) {
        for (int j = 0; j < image1.Height; j++) {
            Color pixel1 = image1.GetPixel(i, j);
            Color pixel2 = image2.GetPixel(i, j);
            double deltaR = pixel1.R - pixel2.R;
            double deltaG = pixel1.G - pixel2.G;
            double deltaB = pixel1.B - pixel2.B;
            mse += deltaR * deltaR + deltaG * deltaG + deltaB * deltaB;
        }
    }

    mse /= (image1.Width * image1.Height * 3);
    return mse;
}

List<double> similarityScores = new List<double>();

foreach(Bitmap image in images) {
    double mse = ComputeMSE(image, givenImage);    
    similarityScores.Add(mse);
}
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main.cs
Array.Sort(similarityScores.ToArray(), jpgFiles);
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