SevenDigital.Kata.Euler.Problems.Problem_004_Palindromic.Palindrome.AllPalindromes C# (CSharp) Method

		public IEnumerable<int> AllPalindromes()
		{
			string highestNumberString = string.Empty;

			for (int i = 0; i < _numberOfDigits; i++)
			{
				highestNumberString += "9";
			}

			int highestNumber = Convert.ToInt32(highestNumberString);
			for (int outer = highestNumber; outer > 0 ; outer--)
			{
				for (int inner = highestNumber; inner > 0 ; inner--)
				{
					var value = outer*inner;
					if (value % 11 == 0 &&  IsPalindrome(value.ToString()))
						yield return value;
				}
			}
		}