What is correct about LINQ to entities?

LINQ to Entities provides Language-Integrated Query (LINQ) support that enables developers to write queries against the Entity Framework conceptual model using Visual Basic or Visual C#. Queries against the Entity Framework are represented by command tree queries, which execute against the object context.

What is the difference between LINQ and Entity Framework?

Entity Framework is an object-relational mapping (ORM) framework for connecting C# code to external databases, usually SQL Server. LINQ is a query language embedded into C# and a set of extension methods in order to make it useful.

Is it possible to carry forward the existing applications built on ADO net to the Entity Framework?

Any application that uses the . NET Framework starting with version 3.5 SP1 can be migrated to the Entity Framework, as long as the data provider for the data source that is used by the application supports the Entity Framework.

Is LINQ faster than foreach?

No, LINQ iterators are not and will never be faster than foreach .

Can we use LINQ without Entity Framework?

No. Linq as in query over the data-in-memory that was loaded using your stored procedures (which means that your queries won’t be translated to SQL)?

Is it possible to use Entity Framework with Web Services and WCF?

The WCF Service Library template can be used to create WCF Services that will be hosted by the WCF Service Host, and these can be tested using the WCF Service Test Client. Entity Framework can be used to model backend databases.

What is lazy loading in Entity Framework with example?

Lazy loading is the process whereby an entity or collection of entities is automatically loaded from the database the first time that a property referring to the entity/entities is accessed. Lazy loading means delaying the loading of related data, until you specifically request for it.

Is LINQ inefficient?

LINQ isn’t really inefficient as such — that’s not really how I would put it. When used correctly, the performance is pretty good and it buys you elegance and a massive amount of expressive power with relatively little performance tradeoff. I use LINQ everywhere in my code and the maintainability gains are palpable.

Is LINQ in C# actually slow?

Conclusion. It would seem the performance of LINQ is similar to more basic constructs in C#, except for that notable case where Count was significantly slower. If performance is important it’s crucial to do benchmarks on your application rather than relying on anecdotes (including this one).

Which is faster LINQ or Entity Framework?

LINQ To SQL is slow for the first time run. After first run provides acceptable performance. Entity Framework is also slow for the first run, but after first run provides slightly better performance compared to LINQ To SQL. Microsoft intended to obsolete LINQ To SQL after the Entity Framework releases.