❔ Registering a class with string parameter for DI.

using System;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Serializers;
using MongoDB.Driver;
using Play.Catalog.Service.Entities;
using Play.Catalog.Service.Settings;

namespace Play.Catalog.Service.Repositories
{
    public static class Extensions
    {
        public static IServiceCollection AddMongo(this IServiceCollection services)
        {
            BsonSerializer.RegisterSerializer(new GuidSerializer(BsonType.String));
            BsonSerializer.RegisterSerializer(new DateTimeOffsetSerializer(BsonType.String));

            services.AddSingleton(provider =>
            {
                var configuration = provider.GetRequiredService<IConfiguration>();
                // This configuration compiles to be null.
                var mongoDbSettings = configuration.GetSection(nameof(MongoDbSettings)).Get<MongoDbSettings>();
                var mongoClient = new MongoClient(mongoDbSettings.ConnectionString);
                return mongoClient.GetDatabase("service");
            });
            return services;
        }
    }
}

builder.Services.AddMongo();