对象引用未设置为调试时对象的实例

Question

我在调试时遇到错误：

  

System.NullReferenceException：未将对象引用设置为对象的实例   在COServer_Project.Mobs.SpawnAllMobs（）
  在C：\ Users \ Donavon Decker \ Desktop \ New folder \ COServerProject \ Entities.cs：第189行

这是代码：

public static void SpawnAllMobs()
    {
        try
        {
            int MobsSpawned = 0;
            int MobSpawnsToSpawn = DataBase.MobSpawns.Length;

            for (int j = 0; j < MobSpawnsToSpawn; j++)
            {
                uint[] ThisSpawn = DataBase.MobSpawns[j];
                string[] ThisMob = null;

                foreach (string[] FindId in DataBase.Mobs)
                {
                    if (FindId[0] == Convert.ToString(ThisSpawn[1]))
                    {
                        ThisMob = FindId;
                    }
                }

                for (int n = 0; n < Convert.ToInt32(ThisSpawn[2]); n++)
                {
                    uint UID = (uint)General.Rand.Next(400000, 500000);
                    short spawn_x = (short)General.Rand.Next(Convert.ToInt16(ThisSpawn[3]), Convert.ToInt16(ThisSpawn[5]));
                    short spawn_y = (short)General.Rand.Next(Convert.ToInt16(ThisSpawn[4]), Convert.ToInt16(ThisSpawn[6]));
                    while (AllMobs.Contains(UID))
                    {
                        UID = (uint)General.Rand.Next(400000, 500000);
                    }
                    SingleMob Mob = new SingleMob(spawn_x, spawn_y, Convert.ToInt16(ThisSpawn[7]), uint.Parse(ThisMob[3]), uint.Parse(ThisMob[3]), short.Parse(ThisMob[6]), short.Parse(ThisMob[7]), UID, ThisMob[2], int.Parse(ThisMob[1]), short.Parse(ThisMob[4]), (byte)General.Rand.Next(8), byte.Parse(ThisMob[5]));


                    AllMobs.Add(UID, Mob);

                    MobsSpawned++; ;
                }
            }
            DataBase.Mobs = null;
            DataBase.MobSpawns = null;
            General.WriteLine("Spawned " + MobsSpawned + " mobs.");
        }
        catch (Exception Exc) { General.WriteLine(Convert.ToString(Exc)); }
    }

这是第189行：

int MobSpawnsToSpawn = DataBase.MobSpawns.Length;

我不知道如何解决此问题。如果有人可以提供帮助，那就太棒了。