What is POCO in Entity Framework?

Question

I just started learning POCO but I cannot understand the usage and advantage. Even the following link of StackOverflow did not help me.

what is Entity Framework with POCO

Can anybody explain the usage of POCO with a simple example?

Solution

POCOs(Plain old CLR objects) are simply entities of your Domain. Normally when we use entity framework the entities are generated automatically for you. This is great but unfortunately these entities are interspersed with database access functionality which is clearly against the SOC (Separation of concern). POCOs are simple entities without any data access functionality but still gives the capabilities all EntityObject functionalities like

• Lazy loading
• Change tracking

Here is a good start for this

POCO Entity framework

You can also generate POCOs so easily from your existing Entity framework project using Code generators.

EF 5.X DbContext code generator

Comments

[Aske B.]

Your "POCO Entity framework MSDN Part-I" link is broken. Is it this now? msdn.microsoft.com/en-us/library/dd456853(v=vs.100).aspx

[Prabhu Murthy]

@AskeB. thanks updated the link. thats the one

[Halter]

I've always refereed to POCOs as "plain old C objects" is this wrong or just different?

[Nate Barbettini]

@Halter "Plain ol' C# objects", or (as Prabhu) said "CLR objects" since the same concept applies to VB and F#.