Closed Issue: If possible, avoid calling DbProviderFactories.GetFactory to check for correct factory [484]

We use this when trying to associate connections with provider invariant names and factories to ensure that we get a good match. However, it means that we potentially load provider assemblies that are not being used, which can impact memory usage. If possible we should find a way of ensuring a good match without loading assemblies that are not needed.
Comments: We've done all we can do in this area.