internal static string InternalEvaluateDiagonalRow(this string[,] matrix, int pivotX, int pivotY)
{
var listValues = new List <string>();
var pivot = matrix.GetCharacter(pivotX, pivotY);
listValues.Add(pivot);
string nextCharacter;
do
{
pivotX -= 1;
pivotY += 1;
nextCharacter = matrix.GetCharacter(pivotX, pivotY);
if (!string.IsNullOrEmpty(nextCharacter))
{
listValues.Add(nextCharacter);
}
} while (nextCharacter != null);
return(string.Join(string.Empty, listValues));
}