“Specified cast is not valid” error when saving LINQ-To-SQL entity

Question

App Details: C#, ASP.NET MVC, SQL Server 2008 ( Same version & SP level), Linq-To-SQL ORM

I\'m trying to diagnose an exception I\'m receiving:

Answer 1

This is a well-known bug in LINQ to SQL.

https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=351358

There is a hotfix for the issue.

http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=963657&kbln=en-us