How to keep Unity Editor TCP client and Tcp Server static variables when entering PlayMode

Hey,

I am trying to build a tcp server on Unity Editor to deal with some request like loading scene and play/stop the game. This server works perfectly in edit mode, but will lose my static variables like Tcp Listerner and Tcp Client when I click Play mode. Is there any way around to avoid this?

Also I use EditorCoroutines to listen for client messge. This coroutine seems to stop as well (of course I lost my static variable client)

The actual code is a bit long, but I can provide a snippets of it.

 [ExecuteInEditMode]
 //[ExecuteAlways]
 public class the_server : MonoBehaviour
 {
     #region Public Variables
     [Header("Network")]
     public static string ipAdress = "127.0.0.1";
     public static int port = 54010;
     public static float waitingMessagesFrequency = 2;
     #endregion
 
     #region Private m_Variables
     private static TcpListener m_Server = null;
     private static TcpClient m_Client = null;
     private static NetworkStream m_NetStream = null;
     private static byte[] m_Buffer = new byte[49152];
     private static int m_BytesReceived = 0;
     private static string m_ReceivedMessage = "";
     private static IEnumerator m_ListenClientMsgsCoroutine = null;
     private static EditorCoroutine m_Ed_ListenClientMsgsCoroutine = null;
     #endregion
 
  [InitializeOnLoadMethod]
     static void InitializeOnLoadMethod()
     {
         EditorApplication.update += Update;
 
         if (!EditorApplication.isPlayingOrWillChangePlaymode)
         {
             
             Debug.Log("starting");
             IPAddress ip = IPAddress.Parse(ipAdress);
             m_Server = new TcpListener(ip, port);
             m_Server.Start();
             Debug.Log("Sever started");
             Debug.Log(ip);
             Debug.Log(port);
  
             //Wait for async client connection 
             m_Server.BeginAcceptTcpClient(ClientConnected, null);
             OnServerStarted?.Invoke();
         }
     }
 static void Update（）{
         if (m_Client != null && m_Ed_ListenClientMsgsCoroutine == null)
         {
             Debug.Log("Found client");
             //Start Listening Client Messages coroutine
             m_ListenClientMsgsCoroutine = ListenClientMessages();
             //EditorCoroutineUtility.StartCoroutine(m_ListenClientMsgsCoroutine, this);
             //CallCoroutine(m_ListenClientMsgsCoroutine);
             m_Ed_ListenClientMsgsCoroutine = EditorCoroutineUtility.StartCoroutineOwnerless(m_ListenClientMsgsCoroutine);
 
         }
 }
 }

I think my question is : 1. How to keep my static variables when entering playmode 2. How to keep my thread(coroutine) alive when entering playmode

Thanks for any help in advanced.

PS: I am using Unity 2019.2.14f1 so it doesn't have a setting of Domain Reloading.