C# SOCKET realized example of an IM tool, I did not write it in depth, but the basic chat functionality a reality.

Beikx.IM
........\Beikx.IM
........\........\Beikx.IM.csproj
........\........\Beikx.IM.csproj.vspscc
........\........\Form1.cs
........\........\Form1.Designer.cs
........\........\mssccprj.scc
........\........\Program.cs
........\........\Properties
........\........\..........\AssemblyInfo.cs
........\........\..........\Resources.Designer.cs
........\........\..........\Resources.resx
........\........\..........\Settings.Designer.cs
........\........\..........\Settings.settings
........\Beikx.IM.Client
........\...............\AppConfig.cs
........\...............\Beikx.IM.Client.csproj
........\...............\Beikx.IM.Client.csproj.vspscc
........\...............\Cache.cs
........\...............\Client.cs
........\...............\ErrorFactory.cs
........\...............\Forms
........\...............\.....\Login.cs
........\...............\.....\Login.Designer.cs
........\...............\.....\Login.resx
........\...............\.....\Main.cs
........\...............\.....\Main.Designer.cs
........\...............\.....\Main.resx
........\...............\MessageFactory.cs
........\...............\mssccprj.scc
........\...............\Program.cs
........\...............\Properties
........\...............\..........\AssemblyInfo.cs
........\...............\..........\Resources.Designer.cs
........\...............\..........\Resources.resx
........\...............\..........\Settings.Designer.cs
........\...............\..........\Settings.settings
........\...............\UnsafeNativeMethods.cs
........\...............\UserInfoComparer.cs
........\Beikx.IM.Data
........\.............\Beikx.IM.Data.csproj
........\.............\Beikx.IM.Data.csproj.vspscc
........\.............\DataProvider.cs
........\.............\DbException.cs
........\.............\mssccprj.scc
........\.............\Properties
........\.............\..........\AssemblyInfo.cs
........\.............\UserDataProvider.cs
........\Beikx.IM.DatabaseAccess
........\.......................\Beikx.IM.DatabaseAccess.csproj
........\.......................\Beikx.IM.DatabaseAccess.csproj.vspscc
........\.......................\DbException.cs
........\.......................\DbHelper.cs
........\.......................\mssccprj.scc
........\.......................\Properties
........\.......................\..........\AssemblyInfo.cs
........\Beikx.IM.Entity
........\...............\Beikx.IM.Entity.csproj
........\...............\Beikx.IM.Entity.csproj.vspscc
........\...............\EntityBase.cs
........\...............\MessageType.cs
........\...............\mssccprj.scc
........\...............\OnlineInfo.cs
........\...............\Properties
........\...............\..........\AssemblyInfo.cs
........\...............\UserFriendInfo.cs
........\...............\UserInfo.cs
........\Beikx.IM.Server
........\...............\app.config
........\...............\AppConfig.cs
........\...............\Beikx.IM.Server.csproj
........\...............\Beikx.IM.Server.csproj.user
........\...............\Beikx.IM.Server.csproj.vspscc
........\...............\Cache.cs
........\...............\ErrorFactory.cs
........\...............\Forms
........\...............\.....\ClientView.cs
........\...............\.....\ClientView.Designer.cs
........\...............\.....\ClientView.resx
........\...............\.....\Main.cs
........\...............\.....\Main.Designer.cs
........\...............\.....\Main.resx
........\...............\ListItem.cs
........\...............\MessageFactory.cs
........\...............\mssccprj.scc
........\...............\Program.cs
........\...............\Properties
........\...............\..........\AssemblyInfo.cs
........\...............\..........\Resources.Designer.cs
........\...............\..........\Resources.resx
........\...............\..........\Settings.Designer.cs
........\...............\..........\Settings.settings
........\...............\Server.cs
........\Beikx.IM.ServerConsole
........\......................\app.config
........\......................\AppConfig.cs
........\......................\Beikx.IM.ServerC

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