File list (Check if you may need any files):
WindowsApplication1
...................\busness
...................\.......\bin
...................\.......\...\Debug
...................\.......\...\.....\busness.dll
...................\.......\...\.....\busness.pdb
...................\.......\...\.....\database.dll
...................\.......\...\.....\database.pdb
...................\.......\...\.....\student.mdb
...................\.......\busness.csproj
...................\.......\myform1.cs
...................\.......\myform2.cs
...................\.......\obj
...................\.......\...\busness.csproj.FileList.txt
...................\.......\...\Debug
...................\.......\...\.....\busness.dll
...................\.......\...\.....\busness.pdb
...................\.......\...\.....\ResolveAssemblyReference.cache
...................\.......\...\.....\TempPE
...................\.......\Properties
...................\.......\..........\AssemblyInfo.cs
...................\database
...................\........\bin
...................\........\...\Debug
...................\........\...\.....\database.dll
...................\........\...\.....\database.pdb
...................\........\CBGDataInfo.cs
...................\........\Class1.cs
...................\........\database.csproj
...................\........\obj
...................\........\...\database.csproj.FileList.txt
...................\........\...\Debug
...................\........\...\.....\database.dll
...................\........\...\.....\database.pdb
...................\........\...\.....\TempPE
...................\........\Properties
...................\........\..........\AssemblyInfo.cs
...................\WindowsApplication1
...................\...................\bin
...................\...................\...\Debug
...................\...................\...\.....\busness.dll
...................\...................\...\.....\busness.pdb
...................\...................\...\.....\database.dll
...................\...................\...\.....\database.pdb
...................\...................\...\.....\Interop.Excel.dll
...................\...................\...\.....\Interop.VBIDE.dll
...................\...................\...\.....\student.mdb
...................\...................\...\.....\WindowsApplication1.exe
...................\...................\...\.....\WindowsApplication1.pdb
...................\...................\...\.....\WindowsApplication1.vshost.exe
...................\...................\Form1.cs
...................\...................\Form1.Designer.cs
...................\...................\Form1.resx
...................\...................\Form2.cs
...................\...................\Form2.Designer.cs
...................\...................\Form2.resx
...................\...................\Form3.cs
...................\...................\Form3.Designer.cs
...................\...................\Form3.resx
...................\...................\obj
...................\...................\...\Debug
...................\...................\...\.....\Interop.Excel.dll
...................\...................\...\.....\Interop.VBIDE.dll
...................\...................\...\.....\ResolveAssemblyReference.cache
...................\...................\...\.....\TempPE
...................\...................\...\.....\WindowsApplication1.csproj.GenerateResource.Cache
...................\...................\...\.....\WindowsApplication1.csproj.ResolveComReference.cache
...................\...................\...\.....\WindowsApplication1.exe
...................\...................\...\.....\WindowsApplication1.Form1.resources
...................\...................\...\.....\WindowsApplication1.Form2.resources
...................\...................\...\.....\WindowsApplication1.Form3.resources
...................\...................\...\.....\WindowsApplication1.Properties.Resources.resources
...................\...................\...\WindowsApplication1.csproj.FileList.txt
...................\...................\Program.cs
...................\..........