The ExtensionMethods class

This newly added class provides an easy to use an extension method to return all of the properties in a class except the label. If you are unfamiliar with extension methods, these methods provide a very simple syntax to potentially provide complex actions on a single object, like in this case, where we take an arbitrary type and return all of the properties it contains (except for labelName):

using System;
using System.Linq;

namespace chapter03.Common
{
    public static class ExtensionMethods
    {
        public static string[] ToPropertyList<T>(this Type objType, string labelName) =>                     objType.GetProperties().Where(a => a.Name != labelName).Select(a =>                             a.Name).ToArray();
    }
}