CODEWITHSUNDEEP
c#.netassemblies
Marek
Marek

Reputation: 87

C# types quality in 2 assemblies

I have project A with reference to project COMMON. In project COMMON i have interface T. I have another DLL B. The B project has reference to project COMMON. COMMON dll is located in both folders.

In project A i load assembly B using Assembly.LoadFromFile. I need to find all types implemented interface T. 

var types = (from type in assembly.GetExportedTypes() 
where typeof(T).IsAssignableFrom(type) select type).ToList();

I getting 0-size collection. Also i was check types manually in Quick Watch dialog window like :

typeof(T) == assembly.GetExportedTypes()[0].GetInterfaces()[0]

and result was FALSE.

Upvotes: 1

Views: 114

Answers (3)

Marek
Marek

Reputation: 87

OK i solved my problem.

I removed common.dll from plugin folder and i checked "Copy Local" to false. I also using autofac in both projects so for this DLL i was made same steps.

Thanks for Your answers.

Upvotes: 0

Thomas Hetzer
Thomas Hetzer

Reputation: 1637

Shouldn´t that be 

var types = (from type in assembly.GetExportedTypes() 
where typeof(T).IsAssignableFrom(type) select type).ToList();

Upvotes: 1

Lasse V. Karlsen
Lasse V. Karlsen

Reputation: 391336

This expression:

X.IsAssignableFrom(Y)

basically ask, can you do the equivalent of this:

X x = expressionOfTypeY;

In your case you're asking this:

ClassType x = expressionOfInterfaceType;

Which is the wrong way around.

Try this LINQ query instead:

where typeof(T).IsAssignableFrom(type)

Upvotes: 2

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