Description: C# Directory management systems, data use SQL2005, are really not that much done, also as early as usual to add contacts, inquiries, contacts, etc., but the system is very comprehensive, not only involves a database of knowledge, but also involves DLL file generation, learn to write their own DLL component, then refer to very good.
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File list (Check if you may need any files):
AddressList\AddressList\AddressList.cs
...........\...........\AddressList.Designer.cs
...........\...........\AddressList.resx
...........\...........\AddressListUI.csproj
...........\...........\AddressListUI.csproj.user
...........\...........\bin\Debug\AddressList.exe
...........\...........\...\.....\AddressList.pdb
...........\...........\...\.....\addressList.txt
...........\...........\...\.....\AddressList.vshost.exe
...........\...........\...\.....\AddressListBAL.dll
...........\...........\...\.....\AddressListBAL.pdb
...........\...........\...\.....\AddressListBLL.dll
...........\...........\...\.....\AddressListBLL.pdb
...........\...........\...\.....\AddressListDAL.dll
...........\...........\...\.....\AddressListDAL.pdb
...........\...........\FrmAddFriend.cs
...........\...........\FrmAddFriend.Designer.cs
...........\...........\FrmAddFriend.resx
...........\...........\FrmSelectFriend.cs
...........\...........\FrmSelectFriend.Designer.cs
...........\...........\FrmSelectFriend.resx
...........\...........\obj\AddressListUI.csproj.FileList.txt
...........\...........\...\AddressListUI.csproj.FileListAbsolute.txt
...........\...........\...\Debug\AddressList.AddressList.resources
...........\...........\...\.....\AddressList.exe
...........\...........\...\.....\AddressList.FrmAddFriend.resources
...........\...........\...\.....\AddressList.FrmSelectFriend.resources
...........\...........\...\.....\AddressList.pdb
...........\...........\...\.....\AddressList.Properties.Resources.resources
...........\...........\...\.....\AddressListUI.csproj.GenerateResource.Cache
...........\...........\...\.....\ResolveAssemblyReference.cache
...........\...........\...\.....\TempPE\Properties.Resources.Designer.cs.dll
...........\...........\Program.cs
...........\...........\...perties\AssemblyInfo.cs
...........\...........\..........\Resources.Designer.cs
...........\...........\..........\Resources.resx
...........\...........\..........\Settings.Designer.cs
...........\...........\..........\Settings.settings
...........\...........\Sort.cs
...........\AddressList.sln
...........\AddressList.sql
...........\AddressList.suo
...........\...........BAL\AddressListBEL.csproj
...........\..............\bin\Debug\AddressListBAL.dll
...........\..............\...\.....\AddressListBAL.pdb
...........\..............\Friend.cs
...........\..............\obj\AddressListBAL.csproj.FileList.txt
...........\..............\...\AddressListBAL.csproj.FileListAbsolute.txt
...........\..............\...\AddressListBEL.csproj.FileListAbsolute.txt
...........\..............\...\Debug\AddressListBAL.dll
...........\..............\...\.....\AddressListBAL.pdb
...........\..............\...\.....\Refactor\AddressListBAL.dll
...........\..............\Properties\AssemblyInfo.cs
...........\............LL\AddressListBLL.csproj
...........\..............\bin\Debug\AddressListBAL.dll
...........\..............\...\.....\AddressListBAL.pdb
...........\..............\...\.....\AddressListBLL.dll
...........\..............\...\.....\AddressListBLL.pdb
...........\..............\...\.....\AddressListDAL.dll
...........\..............\...\.....\AddressListDAL.pdb
...........\..............\FriendMessageManager.cs
...........\..............\obj\AddressListBLL.csproj.FileList.txt
...........\..............\...\AddressListBLL.csproj.FileListAbsolute.txt
...........\..............\...\Debug\AddressListBLL.dll
...........\..............\...\.....\AddressListBLL.pdb
...........\..............\...\.....\Refactor\AddressListBLL.dll
...........\..............\...\.....\ResolveAssemblyReference.cache
...........\..............\Properties\AssemblyInfo.cs
...........\...........DAL\AddressListDAL.csproj
...........\..............\bin\Debug\AddressListBAL.dll
...........\..............\...\.....\AddressListBAL.pdb
...........\..............\...\.....\AddressListDAL.dll
...........\..............\...\.....\AddressListDAL.pdb
...........\..............\DBHelp.cs
...........\..............\FriendMessageServer.cs
...........\..............\obj\AddressList