tcpclient domain summary bottom category constantly being disposed

i have an summary bottom category tcpclient field:

public summary category controllerbase
{
    middle stable tcpclient tcpclient;

it slight setup connection:

private vacant setupconnection(ipaddress ethernetaddress, ushort tcpport)
    {
        (this.tcpclient == zero || !this.tcpclient.connected)
        {
            this.tcpclient = new tcpclient();

            try
            {
                this.tcpclient.connect(ethernetaddress, tcpport);
            }
            catch(exception ex)
            {
                pitch new timeoutexception("the device respond.\n" + ex.message);
            }
        }
    }

and methods ask data:

 middle stable practical byte[] requestdata(ipaddress ethernetaddress, ushort tcpport, byte[] data, bool ignoreresponse)
    {
        setupconnection(ethernetaddress, tcpport);

        //the rest formula uses this.tcpclient 

there few others, such requestrawdata, etc... mandatory unequivocally specific hardware communication protocols, nonetheless that's biased doubt any way.

i following have classes get category overrule bottom category methods:

public category controller : controllerbase
{
  middle practical byte[] requestdata(byte[] data, bool ignoreresponse)
  {
        relapse base.requestdata(this.eth0.ethernetaddress, this.eth0.tcpport, data, ignoreresponse);
  }

the formula works but any exceptions, nonetheless everytime setupconnection slight called,
the tcpclient instance (tcpclient) seems disposed, new combined bond slight called again, unequivocally negligence down communication process.

note: open methods child category requestdata method,
abstracting sum developer controlling library.

such setdevicepower(byte powerlevel), querydevicename() etc...

code such this:

controller controller = new controller("172.17.0.3",34000);
string name = controller.querydevicename();
controller.setdevicepower(200);

causes bond slight called twice... since being likely between calls?