.NET-Core byte array to Image

No indeed it is not released yet. you can use the library ImageSharp.

To return an image from a byte array, you can either:

1. return base64

   Byte[] profilePicture = await _db.Players
                                    .Where(p => p.Id == playerId)
                                    .Select(p => p.ProfilePicture)
                                    .FirstOrDefaultAsync();
   
   return Ok(Convert.ToBase64String(profilePicture));
   

   And then you can use any online tool that converts base64 to image to test it.

2. or return FileContentResult File(byte[] fileContents, string contentType)

   return File(profilePicture, "image/png");
   

   You should be able to test this from Postman or anything similar as the picture will show up in the body of the response there.