Repeating a string using StringBuilder

Question

I want to repeat .- 40 times and save it to a string using StringBuilder

Why does this not work?

string result = new StringBuilder("").Append(".-",0,40).ToString();

I know about other Solutions but i want to use StringBuilder

Answer 1

That method does not do what you think it does. The 2 int parameters specify the start index and length of the sub-string you want to append.

StringBuilder does have a method for what you want: It's called Insert:

sb.Insert(0, ".-", 40);