C# ImageFormat to string

Question

How can I obtain human readable string(i.e. image format itself) from System.Drawing.ImageFormat object?

I mean if I have ImageF

Answer 1

ImageFormat.Png.ToString() returns "Png"...

EDIT: OK, it seems ToString returns the name only for ImageFormat instances returned by the static properties...

You could create a lookup dictionary to get the name from the Guid:

private static readonly Dictionary _knownImageFormats =
            (from p in typeof(ImageFormat).GetProperties(BindingFlags.Static | BindingFlags.Public)
             where p.PropertyType == typeof(ImageFormat)
             let value = (ImageFormat)p.GetValue(null, null)
             select new { Guid = value.Guid, Name = value.ToString() })
            .ToDictionary(p => p.Guid, p => p.Name);

static string GetImageFormatName(ImageFormat format)
{
    string name;
    if (_knownImageFormats.TryGetValue(format.Guid, out name))
        return name;
    return null;
}