Description: C# file read and write, use the FileStream class to read the file, use the StreamWriter to write the file data, and then use the StreamReader to read the file, line by line output.
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File list (Check if you may need any files):
file_ReadWriteTest\file_ReadWriteTest\bin\Debug\file_ReadWriteTest.exe
..................\..................\...\.....\file_ReadWriteTest.pdb
..................\..................\...\.....\file_ReadWriteTest.vshost.exe
..................\..................\...\.....\file_ReadWriteTest.vshost.exe.manifest
..................\..................\file_ReadWriteTest.csproj
..................\..................\Form1.cs
..................\..................\Form1.Designer.cs
..................\..................\Form1.resx
..................\..................\obj\Debug\file_ReadWriteTest.csproj.FileListAbsolute.txt
..................\..................\...\.....\file_ReadWriteTest.csproj.GenerateResource.Cache
..................\..................\...\.....\file_ReadWriteTest.exe
..................\..................\...\.....\file_ReadWriteTest.Form1.resources
..................\..................\...\.....\file_ReadWriteTest.pdb
..................\..................\...\.....\file_ReadWriteTest.Properties.Resources.resources
..................\..................\Program.cs
..................\..................\...perties\AssemblyInfo.cs
..................\..................\..........\Resources.Designer.cs
..................\..................\..........\Resources.resx
..................\..................\..........\Settings.Designer.cs
..................\..................\..........\Settings.settings
..................\file_ReadWriteTest.sln
..................\file_ReadWriteTest.suo
..................\..................\obj\Debug\Refactor
..................\..................\...\.....\TempPE
..................\..................\bin\Debug
..................\..................\obj\Debug
..................\..................\bin
..................\..................\obj
..................\..................\Properties
..................\file_ReadWriteTest
file_ReadWriteTest