change like this
using System;
Using Server.Items;
namespace Server.Mobiles
{
[CorpseName("a dragon corpse")]
public class Dragon : BaseCreature
{
[Constructable]
public Dragon()
: base(AIType.AI_Mage, FightMode.Closest, 10, 1, 0.2, 0.4)
{
this.Name = "a dragon";
this.Body =...