File list (Check if you may need any files):
ch04\AboutForm.cs
....\AboutForm.Designer.cs
....\AboutForm.resx
....\AddAdminForm.cs
....\AddAdminForm.Designer.cs
....\AddAdminForm.resx
....\AddStudentForm.cs
....\AddStudentForm.Designer.cs
....\AddStudentForm.resx
....\bin\Debug\ch04.exe
....\...\.....\ch04.pdb
....\...\.....\ch04.vshost.exe
....\...\.....\ch04.vshost.exe.manifest
....\ch04.csproj
....\ch04.csproj.user
....\DBHelper.cs
....\images\a.jpg
....\......\AnswerQuestion.gif
....\......\edit.gif
....\......\Icon.ico
....\......\LogIn.gif
....\......\login.ico
....\......\login.jpg
....\......\loginBtn.jpg
....\......\newStu.gif
....\......\newTeacher.gif
....\......\newUser.gif
....\......\question.gif
....\......\search.gif
....\......\searchTeacher.gif
....\......\teacher.gif
....\......\test.gif
....\......\Welcome.jpg
....\......\ya1.gif
....\......\ya2.gif
....\......\ya3.gif
....\......\ya4.gif
....\......\ya5.gif
....\......\ya6.gif
....\......\ya7.gif
....\......\ya8.gif
....\Login.cs
....\Login.Designer.cs
....\login.ico
....\Login.resx
....\Main.cs
....\Main.Designer.cs
....\Main.resx
....\obj\x86\Debug\ch04.AboutForm.resources
....\...\...\.....\ch04.AddAdminForm.resources
....\...\...\.....\ch04.AddStudentForm.resources
....\...\...\.....\ch04.csproj.FileListAbsolute.txt
....\...\...\.....\ch04.exe
....\...\...\.....\ch04.Login.resources
....\...\...\.....\ch04.Main.resources
....\...\...\.....\ch04.pdb
....\...\...\.....\ch04.Properties.Resources.resources
....\...\...\.....\ch04.TestForm.resources
....\...\...\.....\ch04.Welcom.resources
....\...\...\.....\DesignTimeResolveAssemblyReferences.cache
....\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
....\...\...\.....\GenerateResource.read.1.tlog
....\...\...\.....\GenerateResource.write.1.tlog
....\...\...\.....\ResolveAssemblyReference.cache
....\...\...\.....\TempPE\Properties.Resources.Designer.cs.dll
....\Program.cs
....\...perties\AssemblyInfo.cs
....\..........\Resources.Designer.cs
....\..........\Resources.resx
....\..........\Settings.Designer.cs
....\..........\Settings.settings
....\TestForm.cs
....\TestForm.Designer.cs
....\TestForm.resx
....\UserHelper.cs
....\Welcom.cs
....\Welcom.Designer.cs
....\Welcom.resx
C基础\bin\Debug\C基础.exe
.....\...\.....\C基础.pdb
.....\...\.....\C基础.vshost.exe
.....\...\.....\C基础.vshost.exe.manifest
.....\C基础.csproj
.....\C基础.csproj.user
.....\obj\x86\Debug\C基础.csproj.FileListAbsolute.txt
.....\...\...\.....\C基础.exe
.....\...\...\.....\C基础.pdb
.....\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.....\Program.cs
.....\...perties\AssemblyInfo.cs
C基础.sln
C基础.suo
ch02\bin\Debug\ch02.exe
....\...\.....\ch02.pdb
....\...\.....\ch02.vshost.exe
....\...\.....\ch02.vshost.exe.manifest
....\ch02.csproj
....\obj\x86\Debug\ch02.csproj.FileListAbsolute.txt
....\...\...\.....\ch02.exe
....\...\...\.....\ch02.pdb