File list (Check if you may need any files):
App_Code\BusinessLogicLayer\CompositionProblem.cs
........\..................\Course.cs
........\..................\Diff.cs
........\..................\FillBlankProblem.cs
........\..................\JudgeProblem.cs
........\..................\MultiProblem.cs
........\..................\Paper.cs
........\..................\QuestionProblem.cs
........\..................\Role.cs
........\..................\SingleProblem.cs
........\..................\Users.cs
........\CommonComponent\Tree.cs
........\DataAccessHelper\GetSafeData.cs
........\................\SQLString.cs
........\..........Layer\config.cs
........\...............\DataBase.cs
........\BusinessLogicLayer
........\CommonComponent
........\DataAccessHelper
........\DataAccessLayer
App_Code
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