.Where(<condition>).FirstOrDefault() vs .FirstOrDefault(<condition>)

问题

Using Linq to Entities is there a difference between the following?

db.EntityName.Where(a => a.Id == id).FirstOrDefault();

db.EntityName.FirstOrDefault(a => a.Id == id);

Or is it simply a matter of personal preference?

Thanks.

回答1:

Both generate the same SQL statement. The second approach is shorter, while the first might be clearer to some developers. Ultimately it's a matter of personal preference.

You can inspect the SQL using the ObjectQuery.ToTraceString method.

来源：https://stackoverflow.com/questions/19842794/wherecondition-firstordefault-vs-firstordefaultcondition