Imports System
Imports System.Collections
Imports System.Collections.Generic
Imports System.Runtime.Serialization
Imports ServiceStack
Imports ServiceStack.DataAnnotations
Imports IDB.API.DTO.Outlook.Operations
Imports IDB.API.DTO.Common
Namespace Global
    Namespace IDB.API.DTO.Common
        Public Partial Class StringResponse
            Public Overridable Property Value As String
        End Class
    End Namespace
    Namespace IDB.API.DTO.Outlook.Operations
        Public Partial Class GetEmailDraft
            Inherits Outlook365Properties
        End Class
        Public Partial Class Outlook365Properties
            Public Overridable Property PidTag As String
            Public Overridable Property ItemId As String
            Public Overridable Property EwsUrl As String
            Public Overridable Property Token As String
        End Class
    End Namespace
End Namespace
To override the Content-type in your clients, use the HTTP Accept Header, append the .csv suffix or ?format=csv
The following are sample HTTP requests and responses. The placeholders shown need to be replaced with actual values.
POST /csv/reply/GetEmailDraft HTTP/1.1 
Host: doapigw.baasbv.nl 
Accept: text/csv
Content-Type: text/csv
Content-Length: length
{"PidTag":"String","ItemId":"String","EwsUrl":"String","Token":"String"}
HTTP/1.1 200 OK
Content-Type: text/csv
Content-Length: length
{"Value":"String"}