GridView multiple rows select helper




File list:
CheckMarkSelection
.................\CheckMarkSelection
.................\..................\bin
.................\..................\...\Debug
.................\..................\...\.....\CheckMarkSelection.exe
.................\..................\...\.....\CheckMarkSelection.pdb
.................\..................\...\.....\CheckMarkSelection.vshost.exe
.................\..................\...\.....\CheckMarkSelection.vshost.exe.manifest
.................\..................\obj
.................\..................\...\x86
.................\..................\...\...\Debug
.................\..................\...\...\.....\TempPE
.................\..................\...\...\.....\CheckMarkSelection.csproj.FileListAbsolute.txt
.................\..................\...\...\.....\CheckMarkSelection.csproj.GenerateResource.Cache
.................\..................\...\...\.....\CheckMarkSelection.exe
.................\..................\...\...\.....\checkmarkselection.exe.licenses
.................\..................\...\...\.....\CheckMarkSelection.Form1.resources
.................\..................\...\...\.....\CheckMarkSelection.pdb
.................\..................\...\...\.....\CheckMarkSelection.Properties.Resources.resources
.................\..................\...\...\.....\DesignTimeResolveAssemblyReferences.cache
.................\..................\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.................\..................\Properties
.................\..................\..........\AssemblyInfo.cs
.................\..................\..........\licenses.licx
.................\..................\..........\Resources.Designer.cs
.................\..................\..........\Resources.resx
.................\..................\..........\Settings.Designer.cs
.................\..................\..........\Settings.settings
.................\..................\CheckMarkSelection.csproj
.................\..................\Form1.cs
.................\..................\Form1.Designer.cs
.................\..................\Form1.resx
.................\..................\GridCheckMarksSelection.cs
.................\..................\Program.cs
.................\CheckMarkSelection.sln
.................\CheckMarkSelection.suo