Find image format using Bitmap object in C#

If you want to know the format of an image, you can load the file with the Image class, and check its RawFormat property:

using(Image img = Image.FromFile(@"C:\path\to\img.jpg"))
{
    if (img.RawFormat.Equals(System.Drawing.Imaging.ImageFormat.Jpeg))
    {
      // ...
    }
}

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