This is easy. Create an extension method for your string that returns a formatted string based on your coding convention. You can use it in lots of places, not just here. This one works for camelCase and TitleCase.
public static String ToLabelFormat(this String s)
{
var newStr = Regex.Replace(s, "(?<=[A-Z])(?=[A-Z][a-z])", " ");
newStr = Regex.Replace(newStr, "(?<=[^A-Z])(?=[A-Z])", " ");
newStr = Regex.Replace(newStr, "(?<=[A-Za-z])(?=[^A-Za-z])", " ");
return newStr;
}