/// <summary>
/// 取出第一个产品
/// </summary>
/// <returns></returns>
private TProduct DequeueHead()
{
lock (_productQueue.SyncRoot)
{
TProduct result = default(TProduct);
if (_productQueue.Count > 0)
{
result = _productQueue[0];
_productQueue.RemoveAt(0);
}
return(result);
}
}
