// Top of ur .cs file
...
using AndroidCtrl.ADB.Binary;
//or
using AndroidCtrl.ADB.Socket;
...

// Check if ADB is running
if (ADB.IsStarted)
{
	// Stop ADB
	ADB.Stop();
  
	// Force Stop ADB
	ADB.Stop(true);
}
else
{
	// Start ADB
	ADB.Start();
}

// Top of ur .cs file
...
using AndroidCtrl.Fastboot;
...

// Check if Fastboot is running
if (Fastboot.IsStarted)
{
	// Force Stop Fastboot
	Fastboot.ForceStop();
}