private static int StabilisationCount(char[,] grid, Func <int, int, char[, ], char> transformer)
{
var previousGrid = new char[grid.GetLength(0), grid.GetLength(1)];
do
{
Array.Copy(grid, 0, previousGrid, 0, grid.Length);
previousGrid.Transform(grid, transformer);
} while (grid.Count('#') != previousGrid.Count('#') && grid.Count('L') != previousGrid.Count('L'));
return(grid.Count('#'));
}