public MigrationsOperations(
[NotNull] ILoggerProvider loggerProvider,
[NotNull] string assemblyName,
[NotNull] string startupAssemblyName,
[NotNull] string projectDir,
[NotNull] string rootNamespace,
[CanBeNull] IServiceProvider dnxServices = null)
{
Check.NotNull(loggerProvider, nameof(loggerProvider));
Check.NotEmpty(assemblyName, nameof(assemblyName));
Check.NotEmpty(startupAssemblyName, nameof(startupAssemblyName));
Check.NotNull(projectDir, nameof(projectDir));
Check.NotNull(rootNamespace, nameof(rootNamespace));
var loggerFactory = new LoggerFactory();
loggerFactory.AddProvider(loggerProvider);
_loggerProvider = loggerProvider;
_logger = new LazyRef<ILogger>(() => loggerFactory.CreateCommandsLogger());
_projectDir = projectDir;
_rootNamespace = rootNamespace;
_servicesBuilder = new DesignTimeServicesBuilder(dnxServices);
_contextOperations = new DbContextOperations(
loggerProvider,
assemblyName,
startupAssemblyName,
dnxServices);
}