Center pad a string in C♯. #function

string.PadBoth.cs

namespace System
{
  public static class StringExtensions
  {
    /// <summary>
    /// Pads the string on both sides.
    /// </summary>
    /// <param name="length">The length to pad the string to.</param>
    public static string PadBoth(this string str, int length)
    {
      int spaces = length - str.Length;
      int padLeft = spaces / 2 + str.Length;
      return str.PadLeft(padLeft).PadRight(length);
    }
  }
}