General chat programs are using the socket mode of communication. For a chat program, it is generally a server used to relay the message, then multiple clients to connect to the server through the exchange of messages.

AsyncTcp\AsyncTcp\AsyncTcp.sln
........\........\........Client\AsyncTcpClient.csproj
........\........\..............\bin\Debug\AsyncTcpClient.vshost.exe.manifest
........\........\..............\...\Debug
........\........\..............\bin
........\........\..............\FormClient.cs
........\........\..............\FormClient.Designer.cs
........\........\..............\FormClient.resx
........\........\..............\Program.cs
........\........\..............\...perties\AssemblyInfo.cs
........\........\..............\..........\Resources.Designer.cs
........\........\..............\..........\Resources.resx
........\........\..............\..........\Settings.Designer.cs
........\........\..............\..........\Settings.settings
........\........\..............\Properties
........\........\AsyncTcpClient
........\........\........Server\AsyncTcpServer.csproj
........\........\..............\bin\Debug\AsyncTcpServer.vshost.exe.manifest
........\........\..............\...\Debug
........\........\..............\bin
........\........\..............\FormServer.cs
........\........\..............\FormServer.Designer.cs
........\........\..............\FormServer.resx
........\........\..............\Program.cs
........\........\..............\...perties\AssemblyInfo.cs
........\........\..............\..........\Resources.Designer.cs
........\........\..............\..........\Resources.resx
........\........\..............\..........\Settings.Designer.cs
........\........\..............\..........\Settings.settings
........\........\..............\Properties
........\........\..............\User.cs
........\........\AsyncTcpServer
........\AsyncTcp
AsyncTcp

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