try..catch..finally

try         {                        ProcessString(s);         }         catch (Exception e)         {             Console.WriteLine("{0} Exception caught.", e);         }         finally         {         } ============================================================ C# 复制代码

class TryFinallyTest{ static void ProcessString(string s) { if (s == null) { throw new ArgumentNullException(); } } static void Main() { string s = null; // For demonstration purposes. try { ProcessString(s); } catch (Exception e) { Console.WriteLine("{0} Exception caught.", e); } }} /* Output: System.ArgumentNullException: Value cannot be null. at TryFinallyTest.Main() Exception caught. * */

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C# 复制代码

class ThrowTest3{ static void ProcessString(string s) { if (s == null) { throw new ArgumentNullException(); } } static void Main() { try { string s = null; ProcessString(s); } // Most specific: catch (ArgumentNullException e) { Console.WriteLine("{0} First exception caught.", e); } // Least specific: catch (Exception e) { Console.WriteLine("{0} Second exception caught.", e); } }}/* Output:System.ArgumentNullException: Value cannot be null. at TryFinallyTest.Main() First exception caught.*/

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