If I have understood you correctly you need to change the line
Console.WriteLine(Fibonacci(i));
to display a space before each number.
You need
"Composite Formatting"[
^]
For example
Console.WriteLine(" {0}", Fibonacci(i));
[EDIT] - The "ignore the dots" confused me. The simplest way is to change the line
Console.WriteLine(Fibonacci(i));
to
Console.WriteLine(Fibonacci(i).ToString().PadLeft(i + 1,' '));