<PackageReference Include="Microsoft.Extensions.Configuration" Version="10.0.9" />

Microsoft.Extensions.Configuration.StreamConfigurationSource

public abstract class StreamConfigurationSource : IConfigurationSource
Defines the core behavior of stream-based configuration sources and provides a base for derived classes.
public Stream Stream { get; set; }

Gets or sets the stream containing the configuration data.

public abstract IConfigurationProvider Build(IConfigurationBuilder builder)

Builds the StreamConfigurationProvider for this source.