dictionary造成cpu过高

而当数据损坏的时候，灾难是不可预测的。举个例子，比如Dictionary内部用了很多的类似代码：

        private void Insert(TKey key, TValue value, bool add)
        {
            int freeList;
            if (key == null)
            {
                ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key);
            }
            if (this.buckets == null)
            {
                this.Initialize(0);
            }
            int num = this.comparer.GetHashCode(key) & 0x7fffffff;
            int index = num % this.buckets.Length;
            int num3 = 0;
            for (int i = this.buckets[index]; i >= 0; i = this.entries[i].next)
            {
                if ((this.entries[i].hashCode == num) && this.comparer.Equals(this.entries[i].key, key))
                {
                    if (add)
                    {
                        ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_AddingDuplicate);
                    }
                    this.entries[i].value = value;
                    this.version++;
                    return;
                }
                num3++;
            }
            if (this.freeCount > 0)
            {
                freeList = this.freeList;
                this.freeList = this.entries[freeList].next;
                this.freeCount--;
            }
            else
            {
                if (this.count == this.entries.Length)
                {
                    this.Resize();
                    index = num % this.buckets.Length;
                }
                freeList = this.count;
                this.count++;
            }
            this.entries[freeList].hashCode = num;
            this.entries[freeList].next = this.buckets[index];
            this.entries[freeList].key = key;
            this.entries[freeList].value = value;
            this.buckets[index] = freeList;
            this.version++;
            if ((num3 > 100) && HashHelpers.IsWellKnownEqualityComparer(this.comparer))
            {
                this.comparer = (IEqualityComparer<TKey>) HashHelpers.GetRandomizedEqualityComparer(this.comparer);
                this.Resize(this.entries.Length, true);
            }
        }

 for (int i = buckets[hashCode % buckets.Length]; i >= 0; i = entries[i].next) {
          ...
}
如果entries[i].next不幸地指向它自己，那么该for循环就是一个死循环，导致CPU高就不奇怪了。