File list (Check if you may need any files):
CrackSudoku
...........\CrackSudoku.csproj
...........\CrackSudoku.csproj.user
...........\CrackSudoku.sln
...........\CrackSudokuHelper.cs
...........\MainForm.cs
...........\MainForm.Designer.cs
...........\MainForm.resx
...........\Program.cs
...........\Properties
...........\..........\AssemblyInfo.cs
...........\..........\Resources.Designer.cs
...........\..........\Resources.resx
...........\..........\Settings.Designer.cs
...........\..........\Settings.settings
...........\SingleNumber.cs
...........\SingleNumberTextBox.cs
...........\SingleNumberTextBox.Designer.cs
...........\SingleNumberTextBox.resx