Category Archives: C#

Maps Keys to a Collection of Values using Lookup Collection

By | September 12, 2011

Most of us are very familiar with Dictionary Collection which supports only one value per key mapping. But, what if, if you came across with some situation where you need to map keys with collection of elements ? Do we really need to create a custom collection ? I will say, NO.  C# provides another Collection type called… Read More »

Setting up Policies for Extensible Parts in MEF

By | September 7, 2011

Part Lifetime is one of the most important hindrances that we face while working with MEF. It is very important to understand how the parts are going to be shared between plugins such that having been so much open ended, 3rd party plugins remain separated to the objects that you do not want to be shared outside.  In… Read More »

Use of ImportConstructor to inject Constructor code in MEF

By | September 6, 2011

Just like what I have talked for so long in my blog entries about Import, ImportConstructor is another attribute that you can annotate only for a constructor. Sometimes it is needed to have some kind of Dependency that needs to be injected while constructing the object.  In case of a normal Import, the Property is set using Default… Read More »

Working with CompositionBatch in MEF

By | September 4, 2011

CompositionBatch is a new type introduced with MEF library that allows you to individually deal with Part instances. Generally when we are in a situation that we need to manually handle certain type, or more precisely when we need to create the types manually ourselves, it is recommended to use CompositionBatch. Basically you thing think CompositionBatch is just… Read More »

Allow Recomposition in MEF

By | September 3, 2011

MEF supports an opt-in feature that allows recomposition of the Import when the underlying object is changed either explicitely by the user or in the Catalog.  The Recomposable Import unit is called live import as it automatically changes the object cycle when actual underlying object is changed. Today I will discuss how exactly this works in MEF and… Read More »