ASP.NET: custom control (or user control) with property of type List<Something>. Can the property be set in the ASPX source?

Question

I have a user control with a property of type List<Something>:

Private p_myList As New List(Of Guid)
Public Property MyList() As List(Of Guid)
    Get
        Return p_myList
    End Get
    Set(ByVal value As List(Of Guid))
        If value Is Nothing Then Throw New ArgumentNullException()
        p_myList = value
    End Set
End Property

Is it popssible to set this property in the aspx source of the page using the UserControl, e.g., something like:

<uc1:myUserControl runat="server" MyList="3c7d794e-7645-46e7-bdde-a0bc42679261, 3c7d794e-7645-46e7-bdde-a0bc42679262" />

or do I need to create a "compatibility property" of type string which is then parsed? (I know that I could set these values through codebehind, but I'd prefer to do it in the aspx source.)