//Generates x (no of rows) random unique numbers for a specified column.
public int[] GenerateXNumbers(int multiplier)
{
var result = new int[Constants.MatrixNumberOfRows];
for (var rowNumber = 0; rowNumber < Constants.MatrixNumberOfRows; rowNumber++)
{
result[rowNumber] = Digits[_rand.Next(0, Digits.Count)];
Digits.Remove(result[rowNumber]);
}
Digits.AddRange(result);
return(result.Select(r => multiplier * 10 + r).ToArray());
}
