Delegates require information about the type that the method is associated with in order to make a call. In a single app-domain, this isn't a problem, because the server (the object firing the events) has access to the type information for the
C# does not support an explicit fall through for case blocks (unless the block is empty) For an explanation of why, see Why is the C# switch statement designed to not allow fall through, but still require a break? on MSDN The following code is not
概述】.Net 3.0包含3個核心庫:WPF,WWF,WCF.WPF的全稱是Windows Presentation Foundation,是微軟新發布的Vista作業系統的三大核心開發庫之一,其主要負責的是圖形顯示,所以叫Presentation(呈現)。WWF的全稱是Windows Work Flow,使用WWF,可以建立基於處理器流的工作流程,並且把它們部署在任何類型的.NET應用程式中。WCF(全稱Windows Communication
直接使用字串訪問會話字典的方式有幾個缺點:1、很容易由於字串拼錯產生錯誤;2、擷取的對象是object類型的,需要轉換到實際類型好一點的方式是實現編寫一個類,封裝成屬性來使用,比如:http://www.codeproject.com/KB/aspnet/typedsessionstate.aspx其實可以使用BuildProvider+CodeDom來自動產生這個封裝代碼(類似Profile的原理)先來實現BuildProvider:using System.Linq;using System
The following code won't work, because conn goes out of scope before you enter the catch block. try { Connection conn = new Connection(); conn.Open(); } catch { if (conn != null)
When performing any action on a control which requires the updating of a user interface element (e.g. setting the Text property on almost any class derived from Control, updating the data source behind a DataGrid), these operations MUST take place
Where you once used Regsvr32 on unmanaged COM libraries, you will now use Regasm on managed .NET libraries.“Regsvr32 is the command-line tool that registers .dll files as command components in the registry““Regasm.exe, the Assembly Registration tool