Managed Extensibility Framework

Managed Extensibility Framework:

Three core concepts with MEF:

1)      Export(s) : It exposes Contracts and contract like .NET Interface or Class or property

Code:

[Export(typeof(ICache))]

Public class Caching: ICache

{

               Public object Get(string cache_key)

{

               //Caching implementation

}

}

2)      Imports: Used to consume exported instances.

Code:

[Import()]

Private ICache cache;

3)      Catalog: hosts components that need to be composed.

Code:

Public static void Compose(object o)

{

               var container = new CompositionContainer(

                                             new DirectoryCatalog(Path.Combine(

AppDomain.CurrentDomain.BaseDirectory,

@”bin\MEFBin”)));

                              Var batch = new CompostionBatch();

batch.AddPart(o);

               container.Compose(batch);

}