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    <p>of course you can. <code>ImageFormat</code> doesn't mean much. <code>ImageCodecInfo</code> has much more meaning.</p> <p>red_dot.png</p> <p><img src="https://i.stack.imgur.com/PrNbA.png" alt="red_dot.png"></p> <pre><code>&lt;a href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="&gt; &lt;img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="red_dot.png" title="red_dot.png"/&gt; &lt;/a&gt; </code></pre> <p>code:</p> <pre><code>using System.Linq; //... //get image var file_bytes = System.Convert.FromBase64String(@"iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="); var file_stream = new System.IO.MemoryStream(file_bytes); var file_image = System.Drawing.Image.FromStream(file_stream); //list image formats var image_formats = typeof(System.Drawing.Imaging.ImageFormat).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static).ToList().ConvertAll(property =&gt; property.GetValue(null, null)); System.Diagnostics.Debug.WriteLine(image_formats.Count, "image_formats"); foreach(var image_format in image_formats) { System.Diagnostics.Debug.WriteLine(image_format, "image_formats"); } //get image format var file_image_format = typeof(System.Drawing.Imaging.ImageFormat).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static).ToList().ConvertAll(property =&gt; property.GetValue(null, null)).Single(image_format =&gt; image_format.Equals(file_image.RawFormat)); System.Diagnostics.Debug.WriteLine(file_image_format, "file_image_format"); //list image codecs var image_codecs = System.Drawing.Imaging.ImageCodecInfo.GetImageDecoders().ToList(); System.Diagnostics.Debug.WriteLine(image_codecs.Count, "image_codecs"); foreach(var image_codec in image_codecs) { System.Diagnostics.Debug.WriteLine(image_codec.CodecName + ", mime: " + image_codec.MimeType + ", extension: " + @image_codec.FilenameExtension, "image_codecs"); } //get image codec var file_image_format_codec = System.Drawing.Imaging.ImageCodecInfo.GetImageDecoders().ToList().Single(image_codec =&gt; image_codec.FormatID == file_image.RawFormat.Guid); System.Diagnostics.Debug.WriteLine(file_image_format_codec.CodecName + ", mime: " + file_image_format_codec.MimeType + ", extension: " + file_image_format_codec.FilenameExtension, "image_codecs", "file_image_format_type"); </code></pre> <p>debug output:</p> <pre><code>image_formats: 10 image_formats: MemoryBMP image_formats: Bmp image_formats: Emf image_formats: Wmf image_formats: Gif image_formats: Jpeg image_formats: Png image_formats: Tiff image_formats: Exif image_formats: Icon file_image_format: Png image_codecs: 8 image_codecs: Built-in BMP Codec, mime: image/bmp, extension: *.BMP;*.DIB;*.RLE image_codecs: Built-in JPEG Codec, mime: image/jpeg, extension: *.JPG;*.JPEG;*.JPE;*.JFIF image_codecs: Built-in GIF Codec, mime: image/gif, extension: *.GIF image_codecs: Built-in EMF Codec, mime: image/x-emf, extension: *.EMF image_codecs: Built-in WMF Codec, mime: image/x-wmf, extension: *.WMF image_codecs: Built-in TIFF Codec, mime: image/tiff, extension: *.TIF;*.TIFF image_codecs: Built-in PNG Codec, mime: image/png, extension: *.PNG image_codecs: Built-in ICO Codec, mime: image/x-icon, extension: *.ICO Built-in PNG Codec, mime: image/png, extension: *.PNG </code></pre>
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    1. POFind image format using Bitmap object in C#
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    1. COGood find Alex! Though this looks messy, but see the basics turned into a couple of clean extension methods below.
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      1. USNicholas Petersen
 

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