Task Cancel

https://docs.microsoft.com/ru-ru/dotnet/standard/parallel-programming/task-cancellation

https://docs.microsoft.com/ru-ru/dotnet/standard/parallel-programming/how-to-cancel-a-task-and-its-children

https://metanit.com/sharp/tutorial/12.5.php

https://habr.com/ru/post/168669/

https://johnthiriet.com/cancel-asynchronous-operation-in-csharp/

https://stackoverflow.com/questions/10134310/how-to-cancel-a-task-in-await

https://stackoverflow.com/questions/50232129/how-to-cancel-a-running-task

https://stackoverflow.com/questions/49499495/how-to-cancel-task-c-sharp

https://stackoverflow.com/questions/3712939/cancellation-token-in-task-constructor-why

https://binary-studio.com/2015/10/23/task-cancellation-in-c-and-things-you-should-know-about-it/

https://arghya.xyz/articles/task-cancellation/

https://www.codeproject.com/Questions/1243163/Csharp-how-to-cancle-task-run-by-click-on-another