C＃異常處理特定類

Question

具有特定異常類的主要優點是什麼，因爲我們可以在System.Exception類中擁有所有異常。 爲什麼會使用特定的錯誤處理類？

Answer 1

異常處理程序按類別工作。如果你只有一個例外類，你可以這樣做：

try 
{ 
    //Do something that might raise different types of exceptions 
} 
catch(ArgumentException e1) //Catch any exception that is an ArgumentException or one its derived types 
{ 
    //Do something to handle the invalid argument 
} 
catch(NetworkException e2) //Catch any exception that is a NetworkException or one of its derived types 
{ 
    //Do something to handle the issue with the network 
} 
catch(Exception e3) 
{ 
    //Do something to log the unexpected exception 
    throw; 
} 

注意you should not catch the base exception，除非你正在做的唯一事情就是登錄並重新拋出。