Imports System.Drawing
Imports System.ComponentModel
Imports System.ComponentModel.DataAnnotations.Schema
' ...
<DefaultClassOptions>
Public Class Employee
    ' ...

    Private _photo As Image
    ' The hidden property that is mapped to a database column
    ' and stores image data as a binary array.
    Private privatePhotoData As Byte()
    <Browsable(False)>
    Public Property PhotoData() As Byte()
        Get
            Return privatePhotoData
        End Get
        Protected Set(ByVal value As Byte())
            privatePhotoData = value
        End Set
    End Property
    ' The property that is visible in XAF UI, but is not mapped to a database column.
    <NotMapped, _
    ImageEditor(ListViewImageEditorMode := ImageEditorMode.PopupPictureEdit, _
    DetailViewImageEditorMode := ImageEditorMode.DropDownPictureEdit)>
    Public Property Photo() As Image
        Get
            If (_photo Is Nothing) AndAlso (PhotoData IsNot Nothing) Then
                Dim imageConverter As New ImageConverter()
                _photo = CType(imageConverter.ConvertFrom(PhotoData), Image)
            End If
            Return _photo
        End Get
        Set(ByVal value As Image)
            _photo = value
            If _photo Is Nothing Then
                PhotoData = Nothing
            Else
                Dim imageConverter As New ImageConverter()
                PhotoData = CType(imageConverter.ConvertTo(_photo, GetType(Byte())), Byte())
            End If
        End Set
    End Property
End Class

Imports DevExpress.ExpressApp
Imports DevExpress.Persistent.Base
Imports DevExpress.Persistent.BaseImpl.EF
' ...
<DefaultClassOptions> _
Public Class Contact
    Private privateID As Integer
    <Browsable(False)> _
    Public Property ID() As Integer
        Get
            Return privateID
        End Get
        Private Set(ByVal value As Integer)
            privateID = value
        End Set
    End Property
    Public Property Name() As String
    Public Overridable Property Photo() As MediaDataObject
End Class