Hi Mark,

I think custom properites with partial class for LINQ object class is
supported. As for the property you added, did you by any chance used it in
any data query expression? It seems the custom property will not be
recognized in any query expression to the datasource. Or you just get the
compile error without using the property in any place? here is a web forum
thread mentioned something about add custom property:

#Custom properties in LINQ to SQL classes
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1656614&SiteID=1

and here is a blog article about extending LINQ to SQL query:

#LINQ to SQL (Part 8 - Executing Custom SQL Expressions)
http://weblogs.asp.net/scottgu/archive/2007/08/27/linq-to-sql-part-8-executi
ng-custom-sql-expressions.aspx

Hope this helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



==================================================

Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
ications.



Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://msdn.microsoft.com/subscriptions/support/default.aspx.

==================================================
   

This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------