BirthdayCake.cs

static void Main(string[] args)
{
    string sign = "*";
    string empty = " ";
    string heart = "*";
    int max = 45;
    int height = 3;
    int space = 5;

    Console.WriteLine();
    // heart
    DrawHeart(empty, heart, max);

    // candle
    for (int i = 0; i < 2; i++)
    {
        for (int j = 0; j < max; j++)
            Console.Write((j == max / 2) ? sign : empty);
        Console.WriteLine();
    }

    // top 
    int left = space * 3 - 1;
    int right = max - space * 3;
    BuildCake(empty, max, height, left, right);

    // second
    left = space * 2 - 1;
    right = max - space * 2;
    BuildCake(empty, max, height, left, right);

    // third
    left = space - 1;
    right = max - space;
    BuildCake(empty, max, height, left, right);

    // bottom
    for (int i = 0; i < max; i++)
        Console.Write("-");
}

private static void DrawHeart(string empty, string heart, int max)
{
    for (int i = 0; i < max; i++)
    {
        if ((i >= (max / 2 - 4) && (i < max / 2 - 1)) || (i > (max / 2 + 1) && i <= (max / 2 + 4)))
            Console.Write(heart);
        else
            Console.Write(empty);
    }
    Console.WriteLine();
    for (int i = 0; i < max; i++)
    {
        if ((i == max / 2 - 5) || (i == max / 2 - 1) ||
            (i == max / 2 + 1) || (i == max / 2 + 5))
            Console.Write(heart);
        else
            Console.Write(empty);
    }
    Console.WriteLine();
    for (int i = 0; i < max; i++)
    {
        if ((i == max / 2) || (i == max / 2 - 5) || (i == max / 2 + 5))
            Console.Write(heart);
        else
            Console.Write(empty);
    }
    Console.WriteLine();
    for (int i = 2; i >= 0; i--)
    {
        for (int j = 0; j < max; j++)
        {
            if (j == (max / 2 - i * 2) || j == (max / 2 + i * 2))
                Console.Write(heart);
            else
                Console.Write(empty);
        }
        Console.WriteLine();
    }
}

private static void BuildCake(string empty, int max, int height, int left, int right)
{
    HorizontalCake(empty, max, left, right);
    Console.WriteLine();
    VerticalCake(empty, max, height, left, right);
}

private static void VerticalCake(string empty, int max, int height, int left, int right)
{
    for (int i = 0; i < height; i++)
    {
        for (int j = 0; j < max; j++)
        {
            Console.Write((j == left + 1 || j == right - 1) ? "|" : empty);
        }
        Console.WriteLine();
    }
}

private static void HorizontalCake(string empty, int max, int left, int right)
{
    for (int i = 0; i < max; i++)
        Console.Write((i > left && i < right) ? "-" : empty);
}