gistfile1.txt

 public class AuthorModel
    {
        public int Id
        {
            get; set;
        }
        public string FirstName
        {
            get;set;
        }
        public string LastName
        {
            get; set;
        }
        public string Address
        {
            get; set;
        }
    }

 public class AuthorDTO
    {
        public int Id
        {
            get; set;
        }
        public string FirstName
        {
            get; set;
        }
        public string LastName
        {
            get; set;
        }
        public string Address
        {
            get; set;
        }
    }