是否有等效于 IServiceCollection 的“TryAdd”方法与 IOptions 一起使用<T>图案？

Question

I find the .NET Core IOptions pattern, as expressed in the syntax below, to be quite helpful.

services.Configure<MySettings>(configuration.GetSection("MySettings"));

I also find the TryAdd methods helpful for guarding against duplicating a service registration, like this:

services.TryAddTransient<IMyService, MyService>();

I'm wondering if anyone knows of any technique for accomplishing the same thing with IOptions, or if duplicate registration protection is, perhaps, built into the framework. In other words, I'm looking for something like this:

services.TryConfigure<MySettings>(configuration.GetSection("MySettings"));

Answer 1

Actually, I had the same "issue". I resolved in this way:

if (!services.Any(d => d.ServiceType == typeof(IConfigureOptions<MySettings>)))
{
    services.Configure<MySettings>(configSection);
}

This solution was based on Microsoft TryAdd code .

Tip: You can create an extension method for it.