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                # try-catch-finally(C# 參考) **catch** 和 **finally** 一起使用的常見方式是:在 **try** 塊中獲取并使用資源,在 **catch** 塊中處理異常情況,并在 **finally** 塊中釋放資源。 有關重新引發異常的更多信息和示例,請參見 [try-catch](https://msdn.microsoft.com/zh-CN/library/0yd65esw.aspx) 和[“引發異常”](https://msdn.microsoft.com/zh-CN/library/xhcbs8fz.aspx)。有關 **finally** 的更多信息,請參見 [嘗試最終](https://msdn.microsoft.com/zh-CN/library/zwc8s4fz.aspx)塊。 ``` public class EHClass { void ReadFile(int index) { // To run this code, substitute a valid path from your local machine string path = @"c:\users\public\test.txt"; System.IO.StreamReader file = new System.IO.StreamReader(path); char[] buffer = new char[10]; try { file.ReadBlock(buffer, index, buffer.Length); } catch (System.IO.IOException e) { Console.WriteLine("Error reading from {0}. Message = {1}", path, e.Message); } finally { if (file != null) { file.Close(); } } // Do something with buffer... } } ``` ## C# 語言規范 有關詳細信息,請參閱 [C# 語言規范](https://msdn.microsoft.com/zh-CN/library/ms228593.aspx)。該語言規范是 C# 語法和用法的權威資料。 ## 請參閱 [C# 參考](https://msdn.microsoft.com/zh-CN/library/618ayhy6.aspx) [C# 編程指南](https://msdn.microsoft.com/zh-CN/library/67ef8sbd.aspx) [C# 關鍵字](https://msdn.microsoft.com/zh-CN/library/x53a06bb.aspx) [try、throw 和 catch 語句 (C++)](https://msdn.microsoft.com/zh-CN/library/6dekhbbc.aspx) [異常處理語句(C# 參考)](https://msdn.microsoft.com/zh-CN/library/s7fekhdy.aspx) [throw(C# 參考)](https://msdn.microsoft.com/zh-CN/library/1ah5wsex.aspx) [如何:顯式引發異常](https://msdn.microsoft.com/zh-CN/library/xhcbs8fz.aspx) [using 語句(C# 參考)](https://msdn.microsoft.com/zh-CN/library/yh598w02.aspx)
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