I’m trying to read/write the same image file’s stream. The image file read is working fine but When I writes the image file successfully and then open the image, It shows “It appears that we don’t support this file format.”

     //reading jpeg image file
string fileContent = string.Empty;
        using (FileStream fileStream = new FileStream("sparrow.jpeg", FileMode.Open, FileAccess.Read))
        {
            using (StreamReader reader = new StreamReader(fileStream))
            {
                fileContent = reader.ReadToEnd();
            }
        }
        
        //writing jpeg image file
        byte[] imageBytes = Encoding.Unicode.GetBytes(fileContent);
        System.IO.File.WriteAllBytes("sparrow2.jpeg", imageBytes);