It's the code inside the book of <Multithreading with C# Cookbook (Second Edition)> Eugene Agafonov
OS: Windows 10 Professional 64bit (Version Number:1903, Operating System Version: 18362.356) CPU: Intel Core i5-8250U 1.60GHz RAM: 8GB
Visual Studio Enterprise 2017 (Version: 15.9.16)
Microsoft .NET Framework (Version: 4.8.03752)