Updating DocumentDB sdk

CosmosDbDatabaseBackgroundService.cs

using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.Documents;
using Microsoft.Azure.Documents.Client;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;

namespace Foo
{
    public class CosmosDbDatabaseBackgroundService : BackgroundService
    {
        private readonly CosmosDbOptions _cosmosDbOptions;
        private readonly IDocumentClient _client;

        public CosmosDbDatabaseBackgroundService(IOptions<CosmosDbOptions> cosmosDbOptions, IDocumentClient client)
        {
            _cosmosDbOptions = cosmosDbOptions.Value;
            _client = client;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            await _client.CreateDatabaseIfNotExistsAsync(new Database { Id = _cosmosDbOptions.Database }).ConfigureAwait(false);

            var cosmosdDbCollections = _cosmosDbOptions.Collections.Split(',', ';');
            foreach (var collectionName in cosmosdDbCollections)
            {
                var databaseUri = UriFactory.CreateDatabaseUri(_cosmosDbOptions.Database);
                var documentCollection = new DocumentCollection { Id = collectionName.Trim(), DefaultTimeToLive = _cosmosDbOptions.DefaultTimeToLiveInSec };
                var options = new RequestOptions { OfferThroughput = _cosmosDbOptions.ReadUnit };

                await _client.CreateDocumentCollectionIfNotExistsAsync(databaseUri, documentCollection, options).ConfigureAwait(false);
            }
        }
    }
}

CosmosDbOptions.cs

namespace Foo
{
    public class CosmosDbOptions
    {
        public string Endpoint { get; set; }
        
        public string Authkey { get; set; }

        public string Database { get; set; }

        public string Collections { get; set; }

        public int ReadUnit { get; set; } = 400;

        public int DefaultTimeToLiveInSec { get; set; } = 60 * 60 * 24;
    }
}

Foo.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
  </PropertyGroup>

  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.DocumentDB.Core" />
    <PackageReference Include="Microsoft.Extensions.Options" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" />
    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
  </ItemGroup>

</Project>