How to check a folder is a child of a particular parent folder in ews C#

See more:

C#

EWS

Hi,
Inbox
--ONE
----TWO
----THREE
--TWO
--THREE
Above is the structure of my inbox. The folder names "TWO" and "THREE" is there in folders as well as subfolders of "ONE". How can I get the folder id of the child folder of "TWO" in the parent folder "ONE"?

What I have tried:

FindFoldersResults findResults = service.FindFolders(WellKnownFolderName.Inbox, new FolderView(int.MaxValue) { Traversal = FolderTraversal.Deep });

With this line of code, I get all the folders and sub folders but unable to get the folder id of child folders of "ONE". Please help.