ArgumentNullException: Value cannot be null. Parameter name: encoder when saving an image!

Question

User991566988 posted

Hi

I've implemented this code to save images at my core 2.1 mvc project:

https://github.com/drsaifyousif/TestingCoreIdentity

Saving images was done successfully but suddenly it returns this error:

ArgumentNullException: Value cannot be null. Parameter name: encoder

I searched about it and found there is a solution by specifying the type of the image: (ImageExtensions.cs)

        public static byte[] ToByteArray(this Image current)
        {
            using (var stream = new MemoryStream())
            {
                //current.Save(stream, current.RawFormat); Not Working
                current.Save(stream, ImageFormat.Jpeg); // Working but will convert the type to Jpeg.
                return stream.ToArray();
            }
        }

How to let the first one works (RawFormat) which take the format of the image please?