I have an interface that I put on certain generated entities in my project.

I'd like to create a class that takes in its ctor an EntityCollection that is constrained to types that implement that interface. Is that possible?

(EDIT) I should have been more clear--the fact that it's a ctor really has nothing to do with it. I would just like to able to constrain the EntityCollection to types that implement that interface.

When I try:

        public ImportMapper(EntityCollection<IMyInterface> temp)
        {
            _coreAttributes = coreAttributes;
            _dynamicAttributes = dynamicAttributes;
            _batchId = batchId;
            _siteId = siteId;
        }

I get:

Error 2 The type 'Flex.DAL.Custom.Interface.IMyInterface' must be convertible to 'SD.LLBLGen.Pro.ORMSupportClasses.EntityBase2' in order to use it as parameter 'TEntity' in the generic type or method 'Flex.DAL.HelperClasses.EntityCollection<TEntity>'

Thanks for any insight.

Phil

I think you should derive from EntityCollection<TEntity>. i.e. create your own collection class that accepts the interface type, and which inherit from EntityCollection<TEntity>.

I think it can be simpler.

public interface IMyInterface
{
}

public class Foo
{
    public void Bar<T>(EntityCollection<T> col)
        where T : EntityBase2, IEntity2, IMyInterface
    {
    }
}

So all you have to do is make your method generic like the example above with the where clause to restrict usage of it.

Thanks guys. That worked.

I'm still confused about why this is not possible to do as a parameter in the ctor of another class. So now I need to instantiate my class and then call an "Initialize" method to properly constrain the collections I want to provide to it.

Though this is a limitation of C# generics (or my understanding of them) and not LLBL.

Thanks again,

Phil