conceptual

问题 How do i show the use of static methods in a UML class diagram? class A{ public static void test(){ } } class B{ public void b(){ A.test(); } } How would a class diagram look like, which shows the relationship? UML 2.0 would be prepared, if there is a difference. 回答1: To show a static method you underline the name of the static method - have a look here for more detailed info. As for navigating that relationship; class B is dependent on the existance of class A . We can say that class B has a

问题 Am I correct that async/await itself has nothing to do with concurrency/parallelism and is nothing more than continuation-passing style (CPS) implementation? And the real threading is performed by SynchronizationContext instance that await passes/restores? If that is correct I have the following question about SynchronizationContext : it guarantees that a continuation will be executed on the same thread. However, are there any guaranties that the thread's context information is persisted? I

问题 I may be missing something but what is the difference between doing: public void MyMethod() { Task t = Task.Factory.StartNew(DoSomethingThatTakesTime); t.Wait(); UpdateLabelToSayItsComplete(); } public async void MyMethod() { var result = Task.Factory.StartNew(DoSomethingThatTakesTime); await result; UpdateLabelToSayItsComplete(); } private void DoSomethingThatTakesTime() { Thread.Sleep(10000); } 回答1: I may be missing something You are. what is the difference between doing Task.Wait and await

问题 I don\'t understand the concept of postfix and prefix increment or decrement. Can anyone give a better explanation? 回答1: All four answers so far are incorrect , in that they assert a specific order of events. Believing that "urban legend" has led many a novice (and professional) astray, to wit, the endless stream of questions about Undefined Behavior in expressions. So. For the built-in C++ prefix operator, ++x increments x and produces (as the expression's result) x as an lvalue, while x++