Method TryIncRef

Expert: increments the RefCount of this IndexReader instance only if the IndexReader has not been disposed yet and returns true iff the RefCount was successfully incremented, otherwise false. If this method returns false the reader is either already disposed or is currently being disposed. Either way this reader instance shouldn't be used by an application unless true is returned.

RefCounts are used to determine when a reader can be disposed safely, i.e. as soon as there are no more references. Be sure to always call a corresponding DecRef(), in a finally clause; otherwise the reader may never be disposed. Note that Dispose(Boolean) simply calls DecRef(), which means that the IndexReader will not really be disposed until DecRef() has been called for all outstanding references.