Base64 でエンコードされた画像文字列を C# でファイルに変換する方法

public Image LoadImage(string base64Image)
{
    // Convert the Base64 string to a byte array
    byte[] bytes = Convert.FromBase64String(base64Image);

    Image image;
    using (MemoryStream ms = new MemoryStream(bytes))
    {
        // Decode the image from the memory stream and store it in the Image object
        image = Image.FromStream(ms);
    }

    return image;
}

protected void SaveMyImage_Click(object sender, EventArgs e)
{
    // Retrieve the Base64 image string from your input
    string base64Image = Hidden1.Value;

    // Generate an Image object from the Base64 string
    Image image = LoadImage(base64Image);

    // Specify the desired file path and name
    string saveLocation = Server.MapPath("~/PictureUploads/my_image.png");

    // Save the decoded image
    image.Save(saveLocation);
}