minor cleanup to TradeCommandSelector

src/main/csharp/net/eagle0/clients/unity/eagle0/Assets/Eagle/CommandSelectors/TradeCommandSelector.cs

@@ -63,14 +63,19 @@ namespace eagle {
                                      : -(int)Math.Ceiling(NetFood * TradeCommand.FoodSellPrice);
         private int GoldAmount => TradeCommand.GoldAvailable + NetGold;
 
-        public override SelectedCommand Command => new() {
-            TradeCommand =
-                    new TradeSelectedCommand {
-                        Amount = Math.Abs(FoodAmount - TradeCommand.FoodAvailable),
-                        TradeType = IsBuy ? TradeSelectedCommand.Types.TradeType.BuyFood
-                                          : TradeSelectedCommand.Types.TradeType.SellFood
-                    }
-        };
+        public override SelectedCommand Command {
+            get {
+                var command = new SelectedCommand {
+                    TradeCommand =
+                            new() {
+                                Amount = Math.Abs(FoodAmount - TradeCommand.FoodAvailable),
+                                TradeType = IsBuy ? TradeSelectedCommand.Types.TradeType.BuyFood
+                                                  : TradeSelectedCommand.Types.TradeType.SellFood
+                            }
+                };
+                return command;
+            }
+        }
 
         public void SetTextFields() {
             goldText.text = GoldAmount.ToString();