https://www.cnblogs.com/chenwolong/p/7531955.html
EF use AsNoTracking (), no tracking and tracing technology (check out the data can not be modified, if you made changes, you will find modifications are not successful)
https://www.cnblogs.com/chenwolong/p/7531955.html
EF use AsNoTracking (), no tracking and tracing technology (check out the data can not be modified, if you made changes, you will find modifications are not successful)