Flush all in-memory buffered updates (adds and deletes) to the Directory.

Note: while this will force buffered docs to be pushed into the index, it will not make these docs visible to a reader. Use {@link #Commit()} instead

NOTE: if this method hits an OutOfMemoryError you should immediately close the writer. See above for details.

[ObsoleteAttribute("please call Commit() instead")]
public void Flush()

<ObsoleteAttribute("please call Commit() instead")> _
Public Sub Flush

[ObsoleteAttribute(L"please call Commit() instead")]
public:
void Flush()