public void Merge(AndroidContact other)
            {
                if (this.Equals(other))
                {
                    if ((FirstName.IsNullOrEmpty() || FirstName.IsNumber()) && !other.FirstName.IsNullOrEmpty())
                    {
                        FirstName = other.FirstName;
                    }

                    if ((LastName.IsNullOrEmpty() || LastName.IsNumber()) && !other.LastName.IsNullOrEmpty())
                    {
                        LastName = other.LastName;
                    }

                    if (NormalizedNumber.IsNullOrEmpty() && !other.NormalizedNumber.IsNullOrEmpty())
                    {
                        NormalizedNumber = other.NormalizedNumber;
                    }
                }
            }