EF6, SQLite won't work without App.config

The minimum needed to make the constructor with connection string working is a custom IProviderInvariantName, IDbDependencyResolver and DbConfiguration:

public class SQLiteProviderInvariantName : IProviderInvariantName{    public static readonly SQLiteProviderInvariantName Instance = new SQLiteProviderInvariantName();    private SQLiteProviderInvariantName() { }    public const string ProviderName = "System.Data.SQLite.EF6";    public string Name { get { return ProviderName; } }}class SQLiteDbDependencyResolver : IDbDependencyResolver{    public object GetService(Type type, object key)    {        if (type == typeof(IProviderInvariantName)) return SQLiteProviderInvariantName.Instance;        if (type == typeof(DbProviderFactory)) return SQLiteProviderFactory.Instance;        return SQLiteProviderFactory.Instance.GetService(type);    }    public IEnumerable<object> GetServices(Type type, object key)    {        var service = GetService(type, key);        if (service != null) yield return service;    }}class SQLiteDbConfiguration : DbConfiguration{    public SQLiteDbConfiguration()    {        AddDependencyResolver(new SQLiteDbDependencyResolver());    }}

Now this should work:

var context = new MyContext("Data Source = mytest.db; Version = 3;");var entities = context.MyEntities.ToList();

Update: For NET4.0 you would also need a custom IDbProviderFactoryResolver:

class SQLiteDbProviderFactoryResolver : IDbProviderFactoryResolver{    public static readonly SQLiteDbProviderFactoryResolver Instance = new SQLiteDbProviderFactoryResolver();    private SQLiteDbProviderFactoryResolver() { }    public DbProviderFactory ResolveProviderFactory(DbConnection connection)    {        if (connection is SQLiteConnection) return SQLiteProviderFactory.Instance;        if (connection is EntityConnection) return EntityProviderFactory.Instance;        return null;    }}

and add

if (type == typeof(IDbProviderFactoryResolver)) return SQLiteDbProviderFactoryResolver.Instance;

to the SQLiteDbDependencyResolver.GetService method implementation.