private static void AddConfigs(IServiceCollection services)
{
services.AddSingleton(x => Cfg.ConfigFactory <GeneralConfig>());
services.AddSingleton <ICfg, GeneralConfig>(x => x.GetService <GeneralConfig>());
var contract = typeof(ICfg);
var configTypes = AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(x => x.GetTypes()
.Where(y => contract.IsAssignableFrom(y) && !y.IsInterface && !y.IsAbstract && y != typeof(GeneralConfig)));
foreach (var configType in configTypes)
{
services.AddSingleton(configType, x => Cfg.ConfigFactory(configType));
services.AddSingleton(contract, x => x.GetService(configType));
}
}