fix 'ToString' method example display (#11852)

Author: StuartMosquera

snippets/csharp/System/DateTime/ToString/ToString4.cs

@@ -1,11 +1,11 @@
-using System;
+// <Snippet3>
+using System;
 using System.Globalization;
 
 public class ToStringExample3
 {
     public static void Main()
     {
-        // <Snippet3>
         CultureInfo[] cultures = [
             CultureInfo.InvariantCulture,
             new CultureInfo("en-us"),
@@ -20,21 +20,22 @@ public static void Main()
         foreach (CultureInfo culture in cultures)
         {
             string cultureName;
+
             if (string.IsNullOrEmpty(culture.Name))
                 cultureName = culture.NativeName;
             else
                 cultureName = culture.Name;
 
             Console.WriteLine($"In {cultureName}, {thisDate.ToString(culture)}");
         }
-
-        // The example produces the following output:
-        //    In Invariant Language (Invariant Country), 05/01/2009 09:00:00
-        //    In en-US, 5/1/2009 9:00:00 AM
-        //    In fr-FR, 01/05/2009 09:00:00
-        //    In de-DE, 01.05.2009 09:00:00
-        //    In es-ES, 01/05/2009 9:00:00
-        //    In ja-JP, 2009/05/01 9:00:00
-        // </Snippet3>
     }
 }
+
+// The example produces the following output:
+//    In Invariant Language (Invariant Country), 05/01/2009 09:00:00
+//    In en-US, 5/1/2009 9:00:00 AM
+//    In fr-FR, 01/05/2009 09:00:00
+//    In de-DE, 01.05.2009 09:00:00
+//    In es-ES, 01/05/2009 9:00:00
+//    In ja-JP, 2009/05/01 9:00:00
+// </Snippet3>