教你50招提高ASP.NET性能（二十二）：利用.NET 4.5異步結構

(40)Take advantage of .NET 4.5 async constructs

招數40：

利用.NET 4.5異步結構

With the arrival of .NET 4.5, writing async code correctly is easier than ever. Like any tool, it should be only applied where it makes most sense – in web use-cases this usually revolves around I/O operations (i.e. reading from disk, any network operation, database operations, or calls to web services).

隨着.NET 4.5的到來，正確地編寫異步代碼比以往更容易。與其餘工具同樣，它應該只運用在最有意義的地方 - 在網絡用例上這一般圍繞着I/O操做（即：從磁盤讀取，一些網絡操做，數據庫操做，或調用Web服務）。