<PackageReference Include="System.Reactive" Version="4.1.3" />

Thread

sealed class Thread
using System.Threading.Tasks; namespace System.Reactive.Concurrency { internal sealed class Thread { private readonly ThreadStart _start; public string Name { get; set; } public bool IsBackground { get; set; } public Thread(ThreadStart start) { _start = start; } public void Start() { Task.Factory.StartNew(Run, TaskCreationOptions.LongRunning); } private void Run() { _start(); } } }