public EwsItem DownloadItem(
	FolderId id,
	int index
)

Public Function DownloadItem ( 
	id As FolderId,
	index As Integer
) As EwsItem

Parameters

id

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

index

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

Return Value

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

Note
This overload downloads only basic properties of an Exchange. You need to use other overloads (such as those accepting the parameter of EwsItemParts type) to get full e-mail message.

Note
In EWS, message indices start from 0 while in IMAP and POP3 they start from 1. Also, the default sorting order in Exchange is "newer first". In IMAP/POP3, "older first" is the default.

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

Reference