done

csharp-fundamentals-lists.Main/Core.cs

@@ -29,27 +29,27 @@ public List<string> Question1()
             //       declares a List<string>  which is a collection of strings.
             //       by typing _iceCreams.  intellisense shows all of the methods associated with the _inceCreams list.
             //  TODO:  1.  Find the add method and add two more flavours of ice cream: "Phish Food", "Peanut Butter Cup"
-
+            _iceCreams.AddRange(["Phish Food", "Peanut Butter Cup"]);
             //write code here
 
             return _iceCreams;        
         }
 
         public int Question2()
         {
-            
+
             //TODO:  find the lists method that returns the number of ice creams in the list and return this.
 
             // remove exception and write code here
-            throw new NotImplementedException();
+            return _iceCreams.Count();
         }
         public List<string> Question3()
         {
 
             // The code below concatenates this.MoreIceCream to the _iceCreams list into a new results list.
             //TODO: you can 'chain' methods on the _iceCream list, so add another Concat to include EvenMoreIceCream  (this is defined below) to the result list . e.g.   _iceCreams.Concat(this.MoreIceCream).Concat(other list to concat).ToList()
 
-            List<string> results = _iceCreams.Concat(this.MoreIceCream).ToList();
+            List<string> results = _iceCreams.Concat(this.MoreIceCream).Concat(this.EvenMoreIceCream).ToList();
 
             return results;
 
@@ -64,6 +64,7 @@ public List<string> Question4()
             //      copy the List declaration line from Question3 and add the .Distinct() into the chain.  e.g.  _iceCreams.Concat(this.MoreIceCream).Concat(other list to concat).Distinct().ToList()
             //      be sure to include the MoreIceCream and EvenMoreIceCream lists
 
+            return _iceCreams.Concat(this.MoreIceCream).Concat(this.EvenMoreIceCream).Distinct().ToList();
 
             List<string> results = _iceCreams;
             // remove exception and write code here