Reuse Addr

srv.ps1

# Load assembly
Add-Type -TypeDefinition @"
using System;
using System.Net;
using System.Net.Sockets;

public class TcpServer {
    private TcpListener _listener;
   
    public TcpServer() 
    {
        this._listener = new TcpListener(IPAddress.Parse("127.0.0.1"), 5001);
        this._listener.Start();
        
        // Set SocketOption to allow address reuse
        this._listener.Server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
    }
    
    public void Run()
    {
        while(true)
        {
            Socket client = this._listener.AcceptSocket();
            if(client.Connected)
            {
                Console.WriteLine("Client connected...");
                // Do something with the client
                
                client.Close(); // Ensure to close the client
            }
        }
    }
}
"@ -ReferencedAssemblies System.Net

# Now, instantiate and run the server
$server = New-Object -TypeName TcpServer
$server.Run()