This little method (in C#) splits a pascal-cased string along the word boundaries to put spaces between the words. A pascal-cased string is a string where each word boundary begins with a capital letter.

SpacePascalCase.cs

    public static string SpacePascalCase(string input)
    {
      string splitString = String.Empty;

      for (int idx = 0; idx < input.Length; idx++)
      {
        char c = input[idx];

        if (Char.IsUpper(c)
          // keeps abbreviations together like "Number HEI"
          // instead of making it "Number H E I"
            && ((idx < input.Length - 1
                    && !Char.IsUpper(input[idx + 1]))
                || (idx != 0
                    && !Char.IsUpper(input[idx - 1])))
            && splitString.Length > 0)
        {
          splitString += " ";
        }

        splitString += c;
      }

      return splitString;
    }