如何将IEnumerable 加起来

I have an IEnumerable<IDisposable> collection that I need to dispose of at a given point. The issue is that for some cases all the object will be of one type and disposing of the objects needs to be done by collecting some data from them and making a single RPC call. In other cases, the objects will be of another type and I just need to call Dispose on each of them. collection t