WriteCollection is used internally by the component streaming system to write component properties to a stream. Use WriteCollection for writing component properties that are collections to streams. 

WriteCollection first writes the type identifier indicating a collection. 

If the Value parameter is not nil (Delphi) or NULL (C++), WriteCollection next writes each element of the collection to the stream, bounding the elements with start-of-list and end-of-list markers. Otherwise, it skips the elements, assuming an empty collection. 

Write 

WriteListBegin 

WriteListEnd