[已解决]There is already an open DataReader associated with this Connection which mu

今天程序报错：There is already an open DataReader associated with this Connection which mu……

解决方案：在报错方法之前使用了一个未释放的IQueryable类型，

例如：dbContext.User.Where(x=>x.Age== 18);

需要释放掉上面的DataReader，后面转ToList（）即可。

dbContext.User.Where(x=>x.Age== 18).ToList();