var query = @"SELECT * FROM win32_NetworkConnection";
            var seacher = new ManagementObjectSearcher(query);
            var resultset = seacher.Get();

            foreach (ManagementObject mo in resultset)
            {
                foreach (PropertyData pd in mo.Properties)
                    Console.WriteLine(pd.Name + ": " + (pd.Value ?? "N/A"));
            }

SelectQuery query = new SelectQuery("Win32_NetworkAdapter");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);

foreach (ManagementObject wmiObj in searcher.Get())
{
	string caption = wmiObj.Properties["Caption"].Value;
}

var query = @"SELECT * FROM win32_NetworkConnection";
            var seacher = new ManagementObjectSearcher(query);
            var resultset = seacher.Get();

            foreach (ManagementObject mo in resultset)
            {
                foreach (PropertyData pd in mo.Properties)
                    Console.WriteLine(pd.Name + ": " + (pd.Value ?? "N/A"));
            }