Hi there. What I'm trying to accomplish is to make a series of 3 web parts. One that acts as a provider, second - consumer of a first web part and at the same time a provider for a third web part, third web part - consumer of the second. When overriding the EnsureInterfaces Method the second parameter is InterfaceType and I'm able to enter InterfaceTypes.ICellConsumer OR InterfaceTypes.ICellConsumer. Is it possible to make the second web part act both as a provider and a consumer?