<PackageReference Include="System.Reactive" Version="5.0.0" />

IQbservable

public interface IQbservable
Provides functionality to evaluate queries against a specific data source wherein the type of the data is not specified.
using System.Linq.Expressions; using System.Runtime.CompilerServices; namespace System.Reactive.Linq { [System.Runtime.CompilerServices.NullableContext(1)] public interface IQbservable { Type ElementType { get; } Expression Expression { get; } IQbservableProvider Provider { get; } } }