C#/.NET开发问题

How can I catch a 404?(我怎样才能捕捉到 404?)
Retry a task multiple times based on user input in case of an exception in task(任务发生异常时,根据用户输入多次重试任务)
Should I derive custom exceptions from Exception or ApplicationException in .NET?(我应该从 .NET 中的 Exception 或 ApplicationException 派生自定义异常吗?)
A Task#39;s exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was(通过等待任务或访问其异常属性未观察到任务的异常.结果,未观察到的异常是) - IT屋-程序员软件
The calling thread cannot access this object because a different thread owns it(调用线程无法访问此对象,因为不同的线程拥有它)
Handling exceptions, is this a good way?(处理异常,这是个好办法吗?)
Conditions when finally does not execute in a .net try..finally block(当 finally 不在 .net try..finally 块中执行时的条件)
What really happens in a try { return x; } finally { x = null; } statement?(在 try { return x; 中真正发生了什么?} 最后 { x = null;} 陈述?)
Main method code entirely inside try/catch: Is it bad practice?(主要方法代码完全在 try/catch 中:这是不好的做法吗?)
Silent failures in C#, seemingly unhandled exceptions that does not crash the program(C# 中的静默失败,看似未处理的异常,不会使程序崩溃)
Will code in a Finally statement fire if I return a value in a Try block?(如果我在 Try 块中返回一个值,Finally 语句中的代码会触发吗?)
.NET - What#39;s the best way to implement a quot;catch all exceptions handlerquot;(.NET - 实现“捕获所有异常处理程序的最佳方式是什么?)