https://www.tutorialsteacher.com/csharp/csharp-stack
https://www.tutorialsteacher.com/csharp/csharp-queue
https://www.c-sharpcorner.com/UploadFile/219d4d/queue-collection-and-stack-collection-class-in-C-Sharp/
https://www.geeksforgeeks.org/c-sharp-queue-with-examples/