. Csproj: The project file, the reference, data connection, folder, and file information required to create an application.
. Aspx: A Web form page consists of two parts: visual elements (HTML, server control, and static text) and programming logic of the page. Visual Studio stores these two components in a separate file. The visual element is created in the. aspx file.
. Ascx: ASP.. NET user control (also called "pagelets") is a kind of encapsulation of specific functions and behaviors (the two are used on various pages of Web applications). A user control contains a combination of HTML, code, and other Web or user controls, and is saved in its own file format on the Web server. Its extension is *. ascx. The default configuration in ASP. NET does not allow Web clients to access these files through URLs, but other pages of the website can integrate the functions contained in these files.
. Aspx. cs: the programming logic of the Web form page is located in a separate class file, which is called a code hiding class file (. aspx. cs ).
. Cs: class module code file. The code at the business logic processing layer.
. Asax: Global. asax file (also called ASP.. NET application file) is an optional file that contains the response to ASP. code of application-level events caused by the NET or HTTP module.
. Config: the Web. config file provides configuration information to the directories and all subdirectories where they are located.
. Aspx. resx/. resx: resource file. The resource is logically any non-executable data deployed by the application. By storing data in resource files, you can change the data without recompiling the entire application.
. XSD: a type of XML schema. From DTD and XDR to XSD.
. Pdb: the PDB (Program database) file maintains debugging and project status information, so that you can incrementally link the debugging configuration of the program.
. Suo: solution user options, which record all options that will be associated with the solution, so that each time you open it, it contains your custom settings.
. Asmx: The asmx file contains WebService processing commands and serves as an addressable entry point for XML Web services.
The. vsdisco (Project discovery) file is an XML-based file that contains links to resources (URLs) that provide information for Web Services ).
. Htc: an HTML file containing scripts and defining components specific to HTC. htc provides the implement component mechanism in the script.