ActorsUIHang.puml

@startuml
autonumber
skinparam sequence {
	LifeLineBorderColor black
	LifeLineBackgroundColor transparent
	
	ParticipantBorderColor black
	ParticipantBackgroundColor whiteSmoke
	ParticipantFontColor black
}
skinparam packageStyle rect
skinparam defaultFontName FG Virgil

activate Program
Program -[#LimeGreen]> MessageLoop: Enqueue
MessageLoop --[#LimeGreen]> Program

activate MessageLoop
MessageLoop -> Handler: RunLoop
activate Handler
Handler -> StateMachine: AsyncOperation
activate StateMachine
StateMachine -> TaskAwaiter: MoveNext
TaskAwaiter -> Task: Continue with MoveNext
activate Task
Task --> TaskAwaiter
TaskAwaiter --> StateMachine
StateMachine --> Handler
deactivate StateMachine

Handler -> Handler:Wait
"Timer/IO" -[#CornflowerBlue]> Task: Complete
Task -[#CornflowerBlue]> SynchronizationContext: FinishContinuations
deactivate Task
SynchronizationContext -[#CornflowerBlue]> MessageLoop: Enqueue
@enduml