I have built and used a custom control which works fine.

I now want to add a property that I can set from the various pages where I 
use the control.

I have added the following property in the code behind file:

       Public Property ContentTypeID() As Int16
            Get

                Return mContentTypeID

            End Get
            Set(ByVal value As Int16)

                mContentTypeID = value

            End Set
        End Property

and set it in the page as follows:

<%@ Register TagPrefix="uc1" TagName="_Content" Src="~/_Content.ascx" %>
<uc1:_Content id=_Content ContentTypeID=10  runat="server"></uc1:_Content>

However in design time the error 'Attribute ContentTypeID is not a valid 
attribute of element _Content' comes up for the property/attribute 
ContentTypeID, and of course the value of 10 is not passed through to the 
code behind file.

Any ideas what I am doing wrong?


Thanks, Mike.