I have been using Entity Framework CTP with Code-First as in this tutorial by

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Asked: May 16, 20262026-05-16T01:35:11+00:00 2026-05-16T01:35:11+00:00

I have been using Entity Framework CTP with Code-First as in this tutorial by

0

I have been using Entity Framework CTP with Code-First as in this tutorial by Scott Guthrie and another by Scott Hanselman (can’t post the link, but google “Simple Code First with Entity Framework 4 – Magic Unicorn Feature CTP 4”). This is working perfectly for the main MVC application, but I am now trying to add a testing project, that uses a separate SQL CE Database.

I have added the following to the App.Config file:

<connectionStrings>
    <add name="MyData"
        connectionString="Data Source=D:\myProject\myDb.sdf;"
        providerName="System.Data.SqlServerCe.4.0" />
</connectionStrings>

However when I try to run the tests it throws the following error when trying to create the database:

Test method
MyProjet.Tests.Administration.ModlelTests.Business.TestGetBusinessesList
threw exception:
System.Reflection.TargetInvocationException:
Exception has been thrown by the
target of an invocation. —>
System.TypeInitializationException:
The type initializer for
‘System.Data.SqlServerCe.SqlCeProviderServices’
threw an exception. —>
System.Security.VerificationException:
Operation could destabilize the
runtime.

With the following stack trace:

System.Data.SqlServerCe.SqlCeProviderServices..ctor()
System.Data.SqlServerCe.SqlCeProviderServices..cctor()
System.RuntimeFieldHandle.GetValue(RtFieldInfo
field, Object instance, RuntimeType
fieldType, RuntimeType declaringType,
Boolean& domainInitialized)
System.Reflection.RtFieldInfo.InternalGetValue(Object
obj, Boolean doVisibilityCheck,
Boolean doCheckConsistency)
System.Reflection.RtFieldInfo.InternalGetValue(Object
obj, Boolean doVisibilityCheck)
System.Reflection.RtFieldInfo.GetValue(Object
obj)
System.Data.SqlServerCe.ExtensionMethods.SystemDataSqlServerCeSqlCeProviderServices_Instance_GetValue()
System.Data.SqlServerCe.ExtensionMethods.SystemDataSqlServerCeSqlCeProviderServices_Instance()
System.Data.SqlServerCe.SqlCeProviderFactory.System.IServiceProvider.GetService(Type
serviceType)
System.Data.Common.DbProviderServices.GetProviderServices(DbProviderFactory
factory)
System.Data.Common.DbProviderServices.GetProviderServices(DbConnection
connection)
System.Data.Entity.ModelConfiguration.Internal.Configuration.CodeFirstCachedMetadataWorkspace.GetMetadataWorkspace(DbConnection
storeConnection)
System.Data.Entity.Infrastructure.DbModel.CreateObjectContext[TContext](DbConnection
existingConnection)
System.Data.Entity.Internal.LazyInternalContext.InitializeFromModel(DbModel
model)
System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
System.Data.Entity.Internal.InternalContext.Initialize()
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type
entityType)
System.Data.Entity.Internal.Linq.EfInternalQuery1.Initialize() System.Data.Entity.Internal.Linq.EfInternalQuery1.Include(String
path)
System.Data.Entity.Infrastructure.DbQuery`1.Include(String
path)
MyProjet.Areas.Administration.Models.BusinessModel.GetBusinesses()
in
D:\projects2010\MyProjet\MyProjet\Areas\Administration\Models\BusinessModel.cs:
line 47
MyProjet.Tests.Administration.ModlelTests.Business.TestGetBusinessesList()
in
D:\projects2010\MyProjet\MyProjet.Tests\Administration\ModlelTests\Business.cs:
line 45

I have tried replacing the existing MyData connection string in the MVC application, and it works fine. It only causes this problem when this is added to the Testing project. Additionally the testing project works without problem when pointed at an SQL or SQL Express Database.

Have been struggling with this for a while now, and just can’t figure it out. I am sure I have overlooked something simple.