public EwsItemList DownloadItems(
	IEnumerable<EwsItem> itemIds,
	EwsItemParts parts
)

Public Function DownloadItems ( 
	itemIds As IEnumerable(Of EwsItem),
	parts As EwsItemParts
) As EwsItemList

Parameters

itemIds

Type: System.Collections.GenericIEnumerableEwsItem
The IDs of the items to download. Null reference (Nothing in Visual Basic) not allowed

parts

Type: MailBee.EwsMailEwsItemParts
The settings which specify which portions of MS Exchange items to download (e.g. item ID, mail header, body, etc). You can combine multiple values.

Return Value

To get the list of item IDs for downloading you can use DownloadItemIds(FolderId, Boolean) or Search(FolderId, SearchFilter) methods.

This overload lets you utilize Managed EWS API if you need to download only some portion of items in the folder (for instance, to enable paged output). Alternatively, you can download all IDs of all items using DownloadItemIds(FolderId, Boolean) method and then use DownloadItems(IEnumerable<EwsItem>, EwsItemParts) overload to download the requested items.

Note
This method is not implemented in .NET Core. Use DownloadItemsAsync(IEnumerableEwsItem, EwsItemParts) instead.

Reference