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ASP.NET 4 Unleased - p 5

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Bạn không phải nhập khẩu tất cả các tên miền không gian. ASP.NET cung cấp cho bạn các không gian tên thường được sử dụng miễn phí:. Hệ thống. System.Collections. System.Collections.Generic. System.Collections.Specialized. System.ComponentModel.DataAnnotations. System.Configuration. System.Data.Entity.Linq. System.Data.Linq. System.Text. | 14 CHAPTER 1 Overview of the ASf.NET Framework You don t have to import every namespace. ASP.NET gives you the most commonly used namespaces for free System System.Collections System.Collections.Generic System.Collections.Specialized System.ComponentModel.DataAnnotations System.Configuration System.Data.Entity.Linq System.Data.Linq System.Text System.Text.RegularExpressions System.Web System.Web.Caching System.Web.DynamicData System.Web.SessionState System.Web.Security System.Web.Profile System.Web.UI System.Web.UI.WebControls System.Web.UI.WebControls.WebParts System.Web.UI.HtmlControls System.Xml.Linq The default namespaces are listed inside the pages element in the root web configuration file located at the following path Windows Microsoft.NET Framework v4.0.30128 Config Web.Config Understanding Assemblies An assembly is the actual .dll file on your hard drive in which the classes in.NET Framework are stored. For example all the classes contained in the ASP.NET Framework are located in an assembly named System.Web.dll. From the Library of Wow eBook ASf.NET and the .NET Framework 15 More accurately an assembly is the primary unit of deployment security and version control in .NET Framework. Because an assembly can span multiple files an assembly is often referred to as a logical dll. The two types of assemblies are private and shared. A private assembly can be used by only a single application. A shared assembly on the other hand can be used by all applications located on the same server. Shared assemblies are located in the Global Assembly Cache GAC . For example the System.Web.dll assembly and all the other assemblies included with.NET Framework are located in the Global Assembly Cache. u NOTE The Global Assembly Cache is located physically in your computer s WINDOWS Assembly folder. Before you can use a class contained in an assembly in your application you must add a reference to the assembly. By default an ASP.NET 4 application references the most common .