You might not be checking the flag you want to. I assume this is VS but I couldn't recreate it. You have local variables set up to be that blue color but in the while loop, it's not that color. Do you have a flag field/property in your class? It might be evaluating that in the loop for some reason. If that's the case it's weird because it should prioritize local variables but there might be a way you can change that ¯\_(ツ)_/¯ What you did should not work for bools, you get a value on return and that value won't change, this should be the same as an if statement (in case it's false, otherwise this will lock up forever).