using System;

​

PrintPyramide(10, false);

Console.WriteLine();

PrintPyramide(10, true);

​

static void PrintPyramide(int height, bool rotate)

{

    int maxWidth = rotate ? height : 0;

    for (int i = 1; i <= height; i++)

    {

        PrintLine(i, maxWidth);

    }

​

    for (int i = height - 1; i > 0; i--)

    {

        PrintLine(i, maxWidth);

    }

}

​

static void PrintLine(int width, int maxWidth) => Console.WriteLine(new string('*', width).PadLeft(maxWidth));