<PackageReference Include="System.Reactive" Version="6.0.0-preview.1" />

SynchronizationContextScheduler

public class SynchronizationContextScheduler : LocalScheduler
Represents an object that schedules units of work on a provided SynchronizationContext.
public SynchronizationContextScheduler(SynchronizationContext context)

Creates an object that schedules units of work on the provided SynchronizationContext.

public SynchronizationContextScheduler(SynchronizationContext context, bool alwaysPost)

Creates an object that schedules units of work on the provided SynchronizationContext.