public NavigationPropertyBindingConfiguration HasRequiredBinding <TTargetType, TDerivedEntityType>(
Expression <Func <TDerivedEntityType, TTargetType> > navigationExpression, string entitySetName)
where TTargetType : class
where TDerivedEntityType : class, TEntityType
{
if (navigationExpression == null)
{
throw Error.ArgumentNull("navigationExpression");
}
EntityTypeConfiguration <TDerivedEntityType> derivedEntityType =
_modelBuilder.Entity <TDerivedEntityType>().DerivesFrom <TEntityType>();
return(_configuration.AddBinding(derivedEntityType.HasRequired(navigationExpression), _modelBuilder.EntitySet <TTargetType>(entitySetName)._configuration));
}