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I am trying to replicate an example found on MSDN. I am using ASP.NET and EF 4.1 (CTP?). I've used NuGet to install the EntityFramework package. I am getting this error: The provider did not return a ProviderManifestToken string ... and the database is never created. Here is my connection string: <add name="HospitalContext" connectionString= "data source=.\SQLExpress;initial catalog=NewTestDB;integrated security=True;" providerName="System.Data.SqlClient"/> Here is my code: var pat = new Patient { Name = "Shane123132524356436435234" }; db.Patients.Add(pat); var labResult = new LabResult { Result = "bad", Patient = pat }; int recordAffected = db.SaveChanges(); Here is my context: public class HospitalContext : DbContext { static HospitalContext() { Database.SetInitializer(new HostpitalContextInitializer()); } public DbSet<Patient> Patients { get; set; } public DbSet<LabResult> LabResults { get; set; } } public class HostpitalContextInitializer : DropCreateDatabaseIfModelChanges<HospitalContext> { protected override void Seed(HospitalContext context) { context.Patients.Add(new Patient { Name = "Fred Peters" }); context.Patients.Add(new Patient { Name = "John Smith" }); context.Patients.Add(new Patient { Name = "Karen Fredricks" }); } } This is a fully patched SQL 2008 system, with VS 2010 SP1.

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