Description: There are two functions similar to the example, the first to use the WebClient implementation, a WebRequest class and WebResponse classes with the realization. Explain two examples of when to pay attention to the WebRequest class and WebResponse classes are abstract classes.
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2、访问Internet\2.1 WebClient类\2.1 WebClient类.csproj
...............\...............\2.1 WebClient类.csproj.user
...............\...............\App.ico
...............\...............\AssemblyInfo.cs
...............\...............\bin\Debug\AxInterop.SHDocVw.dll
...............\...............\...\.....\Interop.SHDocVw.dll
...............\...............\...\.....\WebClient类.exe
...............\...............\...\.....\WebClient类.pdb
...............\...............\Form1.cs
...............\...............\Form1.resx
...............\...............\obj\AxInterop.SHDocVw.dll
...............\...............\...\Debug\2.1 WebClient类.projdata
...............\...............\...\.....\WebClient类.exe
...............\...............\...\.....\WebClient类.Form1.resources
...............\...............\...\.....\WebClient类.pdb
...............\...............\...\.....\WebClient类.projdata
...............\...............\...\Interop.SHDocVw.dll
...............\..2 WebRequest类和WebResponse类\2.2 WebRequest类和WebResponse类.csproj
...............\...............................\2.2 WebRequest类和WebResponse类.csproj.user
...............\...............................\App.ico
...............\...............................\AssemblyInfo.cs
...............\...............................\bin\Debug\AxInterop.SHDocVw.dll
...............\...............................\...\.....\Interop.SHDocVw.dll
...............\...............................\...\.....\WebRequest类和WebResponse类.exe
...............\...............................\...\.....\WebRequest类和WebResponse类.pdb
...............\...............................\Form1.cs
...............\...............................\Form1.resx
...............\...............................\obj\AxInterop.SHDocVw.dll
...............\...............................\...\Debug\2.2 WebRequest类和WebResponse类.projdata
...............\...............................\...\.....\WebClient类.Form1.resources
...............\...............................\...\.....\WebRequest类和WebResponse类.exe
...............\...............................\...\.....\WebRequest类和WebResponse类.pdb
...............\...............................\...\.....\WebRequest类和WebResponse类.projdata
...............\...............................\...\Interop.SHDocVw.dll
...............\2、访问Internet.sln
...............\2、访问Internet.suo
...............\Readme.txt
...............\2.1 WebClient类\obj\Debug\temp
...............\...............\...\.....\TempPE
...............\..2 WebRequest类和WebResponse类\obj\Debug\temp
...............\...............................\...\.....\TempPE
...............\..1 WebClient类\bin\Debug
...............\...............\obj\Debug
...............\..2 WebRequest类和WebResponse类\bin\Debug
...............\...............................\obj\Debug
...............\..1 WebClient类\bin
...............\...............\obj
...............\..2 WebRequest类和WebResponse类\bin
...............\...............................\obj
...............\2.1 WebClient类
...............\2.2 WebRequest类和WebResponse类
2、访问Internet
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