public EwsItemList DownloadItems(
	FolderId id,
	int startIndex,
	int count,
	bool unreadOnly,
	PropertySet properties
)

Public Function DownloadItems ( 
	id As FolderId,
	startIndex As Integer,
	count As Integer,
	unreadOnly As Boolean,
	properties As PropertySet
) As EwsItemList

Parameters

id

Type: FolderId
The ID of the folder. Null reference (Nothing in Visual Basic) not allowed.

startIndex

Type: SystemInt32
The zero-based index of the first message in the range to be downloaded.

count

Type: SystemInt32
Number of items to be downloaded.

unreadOnly

Type: SystemBoolean
If true, only unread items are considered for download; otherwise, all the items.

properties

Type: PropertySet
The settings which specify which portions of MS Exchange items to download (e.g. item ID, mail header, body, etc). If a null reference, only item ID is requested.

Return Value

To specify the folder by its name, first get its ID with FindFolderIdByShortName(FolderId, String) or FindFolderIdByFullName(String) method.

This is advanced overload which lets you request item parts in the native way of Exchange EWS (via PropertySet obejct). If you just want to dowload full messages with attachments, use DownloadItems(FolderId, Int32, Int32, Boolean, EwsItemParts) overload and pass MailMessageFull as parts parameter value.

Note
In EWS, message indices start from 0 while in IMAP and POP3 they start from 1. Also, items are returned in the default sorting order which usually means "newer first" in Exchange. In IMAP/POP3, "older first" is the default. To change sorting order, use overloads accepting the parameter of ItemView type.

Note
This method is not implemented in .NET Core. Use DownloadItemsAsync(FolderId, Int32, Int32, Boolean, PropertySet) instead.

Reference