Pascal and Camel Case to Display Text Conversion

This version treats the input string as an indexed string. The code is a little shorter.

private string createDisplayText(string propertyName)
{
    if (String.IsNullOrEmpty(propertyName))
    {
        return String.Empty;
    }

    StringBuilder builder = new StringBuilder();
    builder.Append(char.ToUpper(propertyName[0]));

    for (int i = 1; i < propertyName.Length; ++i)
    {
        builder.Append((char.IsUpper(propertyName, i)) ? " " + 
                propertyName[i].ToString() : propertyName[i].ToString());
    }
    return builder.ToString();
}