' Get the content string for the selected region. Called by the designer host? 
Public Overrides Function GetEditableDesignerRegionContent(ByVal region As EditableDesignerRegion) As String 
    ' Get a reference to the designer host 
    Dim host As IDesignerHost = CType(Component.Site.GetService(GetType(IDesignerHost)), IDesignerHost)

    If Not IsNothing(host) Then 
        Dim template As ITemplate = myControl.View1
        If region.Name = "Content1" Then
            template = myControl.View2
        End If 

        ' Persist the template in the design host 
        If Not IsNothing(template) Then 
            Return ControlPersister.PersistTemplate(template, host)
        End If 
    End If 

    Return String.Empty
End Function

// Get the content string for the selected region. Called by the designer host? 
public override string GetEditableDesignerRegionContent(EditableDesignerRegion region) 
{
    // Get a reference to the designer host
    IDesignerHost host = (IDesignerHost)Component.Site.GetService(typeof(IDesignerHost));
    if (host != null)
    {
        ITemplate template = myControl.View1;
        if (region.Name == "Content1")
            template = myControl.View2;

        // Persist the template in the design host 
        if (template != null)
            return ControlPersister.PersistTemplate(template, host);
    }

    return String.Empty;
}