/// <summary>
/// 创建单例类型的映射并尝试到服务映射集合中
/// </summary>
/// <param name="collection">服务映射集合</param>
/// <param name="serviceType">服务类型</param>
/// <param name="factory">服务实现类型实例工厂</param>
/// <returns></returns>
public static IServiceCollection TryAddSingleton(this IServiceCollection collection, Type serviceType, Func <IServiceProvider, object> factory)
{
ServiceDescriptor descriptor = ServiceDescriptor.Singleton(serviceType, factory);
return(collection.TryAdd(descriptor));
}
/// <summary>
/// 创建单例类型的映射并尝试到服务映射集合中
/// </summary>
/// <param name="collection">服务映射集合</param>
/// <param name="serviceType">服务类型</param>
/// <param name="implementationType">服务实现类型</param>
/// <returns></returns>
public static IServiceCollection TryAddSingleton(this IServiceCollection collection, Type serviceType, Type implementationType)
{
ServiceDescriptor descriptor = ServiceDescriptor.Singleton(serviceType, implementationType);
return(collection.TryAdd(descriptor));
}