C#抽象工厂设计模式（小例子源码）

F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\UI.exe.config F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\UI.exe F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\UI.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\ResolveAssemblyReference.cache F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\UI.Properties.Resources.resources F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\UI.csproj.GenerateResource.Cache F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\UI.exe F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\UI.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\BLL.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\Model.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\DALFactory.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\IDAL.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\Model.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\BLL.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\DALFactory.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\IDAL.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\obj\Debug\UI.Form1.resources F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\SqlDAL.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\DBHelper.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\SqlDAL.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\DBHelper.pdb F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\AccessDAL.dll F:\ASP.NET工作空间\AbstranctFactroy\UI\bin\Debug\AccessDAL.pdb