Greg Brady

Did you try it without the `nuget:` prefix? ``` #r "System.Threading.Tasks.Dataflow" ``` I was facing a similar issue with `using System.ComponentModel.DataAnnotations` and `#r "System.ComponentModel.Annotations"` did the trick. The [docs](https://github.com/dotnet/interactive/blob/main/docs/magic-commands.md#c-kernel) say:...

We are trying to add some better transient fault handling since the built-in [RetryHandler](https://github.com/microsoft/kiota-http-dotnet/blob/main/src/Middleware/RetryHandler.cs#L228) only handles rate limiting and gateway timeouts. We want to add TCP connection timeout retries, etc....

This impacts us as well. We rotate our `NpgsqlDataSource` every 12 hours. Even though we properly Dispose the old data sources and DbContext's, we eventually get: >**'Microsoft.EntityFrameworkCore.Infrastructure.ManyServiceProvidersCreatedWarning':** More than twenty...

Excellent! We're in that multi-tenant scenario. Despite careful re-use & disposal of the NpgsqlDataSoruce and DbContext instances, we still end up with that `ManyServiceProvidersCreatedWarning` error. Here is the full error...