差分

private readonly Dictionary<ImageFormat, string> ContentTypes = new Dictionary<ImageFormat, string>() { {ImageFormat.Bmp , "image/bmp"}, {ImageFormat.Gif , "image/gif"}, {ImageFormat.Icon, "image/vnd.microsoft.icon"}, {ImageFormat.Jpeg, "image/jpeg"}, {ImageFormat.Png , "image/png"}, {ImageFormat.Tiff, "image/tiff"}, {ImageFormat.Wmf , "image/wmf"}, };