Resolving instances with ASP.NET Core DI from within ConfigureServices

問題：

How do I manually resolve a type using the ASP.NET Core MVC built-in dependency injection framework?如何使用 ASP.NET Core MVC 內置依賴注入框架手動解析類型？

Setting up the container is easy enough:設置容器很容易：

public void ConfigureServices(IServiceCollection services)
{
    // ...

    services.AddTransient<ISomeService, SomeConcreteService>();
}

But how can I resolve ISomeService without performing injection?但是如何在不執行注入的情況下解決ISomeService ？ For example, I want to do this:例如，我想這樣做：

ISomeService service = services.Resolve<ISomeService>();

There are no such methods in IServiceCollection . IServiceCollection中沒有這樣的方法。

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解決方案：

參考一： https://en.stackoom.com/question/2CCF4
參考二： https://stackoom.com/question/2CCF4