Уточнение порядка внедрения зависимостей C# .NET ⇐ C#

[Гость]

Я не понимаю поведения DI в следующем случае.

Код: Выделить всё

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;
using Microsoft.Extensions.Azure;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Azure.Identity;

namespace TestResults.Processor;

internal class Program
{

private static async Task Main(string[] args)
{
var configuration = new ConfigurationBuilder()
.AddJsonFile("appsettings.json", false, true)
.AddEnvironmentVariables()
.Build();

var services = new ServiceCollection();

services.AddLogging(configure =>
{
configure.AddConfiguration(configuration.GetSection("Logging"));
configure.AddConsole();
});

services.ConfigureAndInjectServices(configuration);

using var serviceProvider = services.BuildServiceProvider();

var logger = serviceProvider.GetRequiredService();
logger.LogInformation($"serviceBusFqns: ....");
logger.LogInformation($"serviceBusFqns: ....");

}

}

public static class DependencyInjectionHelper
{
public static void ConfigureAndInjectServices(this IServiceCollection services, IConfigurationRoot configuration)
{

var serviceBusFqns = configuration.GetValue("ServiceBus:FullyQualifiedNs");
var managedIdentityClientID = configuration.GetValue("ServiceBus:ManagedIdentityClientID");

services.AddAzureClients(builder =>
{
builder.AddServiceBusClientWithNamespace(serviceBusFqns);
builder.UseCredential(new DefaultAzureCredential());
});

}
}

I am able to see the logs produced on Console. But if I swap the order of these lines:

Код: Выделить всё

services.ConfigureAndInjectServices(configuration);

services.AddLogging(configure =>
{
configure.AddConfiguration(configuration.GetSection("Logging"));
configure.AddConsole();
});

the log does not log anymore (to Console). Why?


Источник: https://stackoverflow.com/questions/781 ... rification