File list (Check if you may need any files):
myfirst
.......\Data
.......\....\xs.mdf
.......\....\xs_log.ldf
.......\myfirst
.......\myfirst.sln
.......\myfirst.suo
.......\.......\app.config
.......\.......\bin
.......\.......\...\Debug
.......\.......\...\.....\myfirst.exe
.......\.......\...\.....\myfirst.exe.config
.......\.......\...\.....\myfirst.pdb
.......\.......\...\.....\myfirst.vshost.exe
.......\.......\...\.....\myfirst.vshost.exe.config
.......\.......\ClsOverallVar.cs
.......\.......\DBOperate.cs
.......\.......\Form1.cs
.......\.......\Form1.Designer.cs
.......\.......\Form1.resx
.......\.......\Form2.cs
.......\.......\Form2.Designer.cs
.......\.......\Form2.resx
.......\.......\Form3.cs
.......\.......\Form3.Designer.cs
.......\.......\Form3.resx
.......\.......\mdMCSDataSet.Designer.cs
.......\.......\mdMCSDataSet.xsc
.......\.......\mdMCSDataSet.xsd
.......\.......\mdMCSDataSet.xss
.......\.......\myfirst.csproj
.......\.......\myfirstDataSet.Designer.cs
.......\.......\myfirstDataSet.xsc
.......\.......\myfirstDataSet.xsd
.......\.......\myfirstDataSet.xss
.......\.......\myfirstDataSet1.Designer.cs
.......\.......\myfirstDataSet1.xsc
.......\.......\myfirstDataSet1.xsd
.......\.......\myfirstDataSet1.xss
.......\.......\myfirstDataSet11.Designer.cs
.......\.......\myfirstDataSet11.xsc
.......\.......\myfirstDataSet11.xsd
.......\.......\myfirstDataSet11.xss
.......\.......\obj
.......\.......\...\Debug
.......\.......\...\.....\myfirst.csproj.GenerateResource.Cache
.......\.......\...\.....\myfirst.exe
.......\.......\...\.....\myfirst.Form2.resources
.......\.......\...\.....\myfirst.Form3.resources
.......\.......\...\.....\myfirst.FrmLogin.resources
.......\.......\...\.....\myfirst.pdb
.......\.......\...\.....\myfirst.Properties.Resources.resources
.......\.......\...\.....\Refactor
.......\.......\...\.....\TempPE
.......\.......\...\.....\......\mdMCSDataSet.Designer.cs.dll
.......\.......\...\.....\......\myfirstDataSet.Designer.cs.dll
.......\.......\...\.....\......\myfirstDataSet1.Designer.cs.dll
.......\.......\...\.....\......\myfirstDataSet11.Designer.cs.dll
.......\.......\...\myfirst.csproj.FileList.txt
.......\.......\Program.cs
.......\.......\Properties
.......\.......\..........\AssemblyInfo.cs
.......\.......\..........\Resources.Designer.cs
.......\.......\..........\Resources.resx
.......\.......\..........\Settings.Designer.cs
.......\.......\..........\Settings.settings