C# Append x occurances of a character to a string

Question

What is the best/recommended way to add x number of occurances of a character to a string e.g.

String header = "HEADER";

The header variable needs to be have say 100 0's added to the end of it. But this number will change depending on other factors.

Answer 1

How about:

header += new string('0', 100);

Of course; if you have multiple manipulations to make, consider StringBuilder:

StringBuilder sb = new StringBuilder("HEADER");
sb.Append('0', 100); // (actually a "fluent" API if you /really/ want...)
// other manipluations/concatenations (Append) here
string header = sb.ToString();

Answer 2

This will append 100 zero characters to the string:

header += new string('0', 100);

Answer 3

How about

string header = "Header";
header.PadRight(header.Length + 100, '0');