RandomUtils.cs

   public static class RandomUtils
    {
        private static string[] Lorem = new[] { "lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "sed", "diam", "nonummy", "nibh", "euismod", "tincidunt", "ut", "laoreet", "dolore", "magna", "aliquam", "erat" };
        public static Random Rand = new Random();

        public static string Words(int max, int min = 1)
        {
            var words = new List<string>();

            for (int i = min; i <= max; i++)
            {
                words.Add(Lorem[Rand.Next(Lorem.Length)]);
            }

            return String.Join(" ", words);
        }

        public static string Sentenses(int count = 1, int max = 6, int min = 4)
        {
            var sentenses = new List<string>();

            for (int i = 0; i < count; i++)
            {
                sentenses.Add(String.Format("{0}.", RandomUtils.Words(max, min).FirstCharToUpper()));
            }

            return String.Join(" ", sentenses);
        }

        public static T Random<T>(this IEnumerable<T> items)
        {
            if (items.Count() == 0)
            {
                return default(T);
            }

            return items.ElementAt(Rand.Next(items.Count()));
        }

        public static string FirstCharToUpper(this string str)
        {
            return String.Format("{0}{1}", str[0].ToString().ToUpper(), str.Substring(1));
        }
    }