What are the difference between EntityFunctions.TruncateTime and DbFunctions.TruncateTime methods?

Question

What are are the difference between:

EntityFunctions.TruncateTime

and

DbFunctions.TruncateTime methods?

Answer 1

There is no difference. EntityFunctions is the class that appears in the versions of the Entity Framework that are built in to the .NET Framework (up through .NET 4.5). The DbFunctions class was introduced in Entity Framework 6 that is shipped separately from the .NET Framework. For any new applications using versions of EF starting with 6.0, you should use the DbFunctions class, as the other class (and much of the built-in EF library) has been obsoleted in favor of the separately deployed versions.

Both functions are merely proxy calls that are translated into the underlying canonical functions within the Entity Framework model and, eventually, into SQL calls.