gistfile1.txt

  public class Person : IEquatable<Person>
  {
      public string UID { get; set; } = Guid.NewGuid().ToString();
      public string Name { get; set; }

      public string Surname { get; set; }
      public int Age { get; set; }


  public bool Equals(Person other)
  {
      if (ReferenceEquals(null, other)) return false;
      if (ReferenceEquals(this, other)) return true;
      return string.Equals(Name, other.Name) && string.Equals(Surname, other.Surname) && Age == other.Age;
  }

  public override bool Equals(object obj)
  {
      if (ReferenceEquals(null, obj)) return false;
      if (ReferenceEquals(this, obj)) return true;
      if (obj.GetType() != this.GetType()) return false;
      return Equals((Person) obj);
  }

  public override int GetHashCode()
  {
      unchecked
      {
          var hashCode = (Name != null ? Name.GetHashCode() : 0);
          hashCode = (hashCode * 397) ^ (Surname != null ? Surname.GetHashCode() : 0);
          hashCode = (hashCode * 397) ^ Age;
          return hashCode;
      }
  }

  public static bool operator ==(Person left, Person right)
  {
      return Equals(left, right);
  }

  public static bool operator !=(Person left, Person right)
  {
      return !Equals(left, right);
  }
}