public interface IMappingRuleFactory
{
    IMappingRule Create(string mappingRuleName, dynamic parameters);
}

public interface IMappingRule
{
    void Execute();
}

public class MappingRuleFactory : IMappingRuleFactory
{
    public IMappingRule Create(string mappingRuleName, dynamic parameters)
    {
        IMappingRule mappingRule = null;

        switch (mappingRuleName)
        {
            case "fooBaz":
                mappingRule = new FooBaz(parameters);
                break;
        }

        return mappingRule;
    }
}

}],
}

}],
}