C# to do, means of communication based on TCP chat program, I hope for your help

第21题
......\BTreeCreate
......\...........\BTreeCreate
......\...........\...........\bin
......\...........\...........\...\Debug
......\...........\...........\...\.....\BTreeCreate.exe
......\...........\...........\...\.....\BTreeCreate.pdb
......\...........\...........\...\.....\BTreeCreate.vshost.exe
......\...........\...........\BTree.cs
......\...........\...........\BTreeCreate.csproj
......\...........\...........\Nodes.cs
......\...........\...........\obj
......\...........\...........\...\BTreeCreate.csproj.FileList.txt
......\...........\...........\...\Debug
......\...........\...........\...\.....\BTreeCreate.csproj.GenerateResource.Cache
......\...........\...........\...\.....\BTreeCreate.exe
......\...........\...........\...\.....\BTreeCreate.pdb
......\...........\...........\...\.....\BTreeCreate.Properties.Resources.resources
......\...........\...........\...\.....\BTreeCreate.Tree.resources
......\...........\...........\...\.....\Refactor
......\...........\...........\...\.....\TempPE
......\...........\...........\Program.cs
......\...........\...........\Properties
......\...........\...........\..........\AssemblyInfo.cs
......\...........\...........\..........\Resources.Designer.cs
......\...........\...........\..........\Resources.resx
......\...........\...........\..........\Settings.Designer.cs
......\...........\...........\..........\Settings.settings
......\...........\...........\Tree.cs
......\...........\...........\Tree.Designer.cs
......\...........\...........\Tree.resx
......\...........\BTreeCreate.sln

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