LINQ need primary key

what the fuck??

clipped from blog.benhall.me.uk Type: System.InvalidOperationException Source: System.Data.Linq TargetSite: Void Attach(T) HelpLink: null Stack: at System.Data.Linq.Table`1.Attach(T item) at SqlServer.SqlContentProvider.SaveDocument(Document document) in E:\My Documents\Visual Studio Codename Orcas\Projects\SqlServer\SqlContentProvider.cs:line 53 at SimpleWiki.DAL.Tests.DocumentTests.TestInsertingDocument() in E:\My Documents\Visual Studio Codename Orcas\Projects\Tests\DocumentTests.cs:line 28 I thought I had everything correctly, however I forgot to set a primary key in the table, hence Linq was unable to do anything with the object.  So, lesson for the day Linq must have a Primary key for the table :).