Remove the & at the end of concatenated string

I have 5 items

• Apple

• Banana

• Melon

• Grapes

• Oranges

I have code that concatenates them into a string like so:

 public void HasChanged ()
     {
         System.Text.StringBuilder builder = new System.Text.StringBuilder();
         builder.Append (" You have chosen: ");
         foreach (Transform slotTransform in slots){
             GameObject item = slotTransform.GetComponent<Slots>().item;
             if (item){
                 builder.Append (item.name);
                 builder.Append (" & ");
             }
         }
         inventoryText.text = builder.ToString ();
     }

Which shows this:

You have chosen: Apples & Bananas & Melons & Grapes & Oranges &

My question is, how do I make it limited to only 5 items in order to remove the '&' at the end? Many thanks in advance!