Update LINQ tutorial sample code to match tutorial progression

samples/snippets/csharp/getting-started/console-linq/Program.cs

@@ -4,56 +4,42 @@
 
 namespace LinqFaroShuffle
 {
-    #region snippet2
-    public enum Suit
-    {
-        Clubs,
-        Diamonds,
-        Hearts,
-        Spades
-    }
-    #endregion
-
-    #region snippet3
-    public enum Rank
-    {
-        Two,
-        Three,
-        Four,
-        Five,
-        Six,
-        Seven,
-        Eight,
-        Nine,
-        Ten,
-        Jack,
-        Queen,
-        King,
-        Ace
-    }
-    #endregion
-
     public class Program
     {
         #region snippet4
-        static IEnumerable<Suit> Suits() => (Enum.GetValues(typeof(Suit)) as IEnumerable<Suit>)!;
+        static IEnumerable<string> Suits()
+        {
+            yield return "clubs";
+            yield return "diamonds";
+            yield return "hearts";
+            yield return "spades";
+        }
         #endregion
 
         #region snippet5
-        static IEnumerable<Rank> Ranks() => (Enum.GetValues(typeof(Rank)) as IEnumerable<Rank>)!;
+        static IEnumerable<string> Ranks()
+        {
+            yield return "two";
+            yield return "three";
+            yield return "four";
+            yield return "five";
+            yield return "six";
+            yield return "seven";
+            yield return "eight";
+            yield return "nine";
+            yield return "ten";
+            yield return "jack";
+            yield return "queen";
+            yield return "king";
+            yield return "ace";
+        }
         #endregion
 
         #region snippet1
         public static void Main(string[] args)
         {
-            IEnumerable<Suit>? suits = Suits();
-            IEnumerable<Rank>? ranks = Ranks();
-
-            if ((suits is null) || (ranks is null))
-                return;
-
-            var startingDeck = (from s in suits.LogQuery("Suit Generation")
-                                from r in ranks.LogQuery("Value Generation")
+            var startingDeck = (from s in Suits().LogQuery("Suit Generation")
+                                from r in Ranks().LogQuery("Rank Generation")
                                 select new { Suit = s, Rank = r })
                                 .LogQuery("Starting Deck")
                                 .ToArray();