File list (Check if you may need any files):
Backup
......\Chuong1.zip
......\Chuong10.zip
......\Chuong11.zip
......\Chuong12.zip
......\Chuong13.zip
......\Chuong14.zip
......\Chuong15.zip
......\Chuong16.zip
......\Chuong2.zip
......\Chuong3.zip
......\Chuong4.zip
......\Chuong5.zip
......\Chuong6.zip
......\Chuong7.zip
......\Chuong8.zip
......\Chuong9.zip
Chuong1
.......\ArrayDemo
.......\.........\ArrayDemo.sln
.......\.........\ArrayDemo.vb
.......\.........\ArrayDemo.vbproj
.......\.........\ArrayDemo.vbproj.user
.......\.........\AssemblyInfo.vb
.......\.........\bin
.......\.........\...\ArrayDemo.exe
.......\.........\...\ArrayDemo.pdb
.......\.........\Module1.vb
.......\.........\obj
.......\.........\...\Debug
.......\.........\...\.....\ArrayDemo.exe
.......\.........\...\.....\ArrayDemo.pdb
.......\.........\...\.....\temp
.......\.........\...\.....\TempPE
.......\AssignmentDemo
.......\..............\AssemblyInfo.vb
.......\..............\AssignmentDemo.sln
.......\..............\AssignmentDemo.vb
.......\..............\AssignmentDemo.vbproj
.......\..............\AssignmentDemo.vbproj.user
.......\..............\bin
.......\..............\...\AssignmentDemo.exe
.......\..............\...\AssignmentDemo.pdb
.......\..............\Module1.vb
.......\..............\obj
.......\..............\...\Debug
.......\..............\...\.....\AssignmentDemo.exe
.......\..............\...\.....\AssignmentDemo.pdb
.......\..............\...\.....\temp
.......\..............\...\.....\TempPE
.......\BadVariables
.......\............\AssemblyInfo.vb
.......\............\BadVariables.sln
.......\............\BadVariables.vb
.......\............\BadVariables.vbproj
.......\............\BadVariables.vbproj.user
.......\............\bin
.......\............\...\BadVariables.exe
.......\............\...\BadVariables.pdb
.......\............\Module1.vb
.......\............\obj
.......\............\...\Debug
.......\............\...\.....\BadVariables.exe
.......\............\...\.....\BadVariables.pdb
.......\............\...\.....\temp
.......\............\...\.....\TempPE
.......\ByRefDemo
.......\.........\AssemblyInfo.vb
.......\.........\bin
.......\.........\...\ByRefDemo.exe
.......\.........\...\ByRefDemo.pdb
.......\.........\ByRefDemo.sln
.......\.........\ByRefDemo.vb
.......\.........\ByRefDemo.vbproj
.......\.........\ByRefDemo.vbproj.user
.......\.........\Module1.vb
.......\.........\obj
.......\.........\...\Debug
.......\.........\...\.....\ByRefDemo.exe
.......\.........\...\.....\ByRefDemo.pdb
.......\.........\...\.....\temp
.......\.........\...\.....\TempPE
.......\ByValueDemo
.......\...........\AssemblyInfo.vb
.......\...........\bin
.......\...........\...\ByValueDemo.exe
.......\...........\...\ByValueDemo.pdb
.......\...........\ByValueDemo.sln
.......\...........\ByValueDemo.vb
.......\...........\ByValueDemo.vbproj
.......\...........\ByValueDemo.vbproj.user
.......\...........\Module1.vb
.......\...........\obj
.......\...........\...\Debug
.......\...........\...\.....\ByValueDemo.exe
.......\...........\...\.....\ByValueDemo.pdb
.......\...........\...\.....\temp
.......\...........\...\.....\TempPE
.......\CastDemo
.......\........\AssemblyInfo.vb