public class Program

{     

    static void Main(string[] args)

    {

        string command = "netsh interface set interface \"Ethernet\" enable";

        ProcessStartInfo processStartInfo = new ProcessStartInfo("CMD", command);

        Process proc = new Process();

        proc.StartInfo = processStartInfo;           

        proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; 

        proc.StartInfo.UseShellExecute = true;

        proc.StartInfo.Verb = "runas";            

        proc.StartInfo.Arguments = "/env /user:" + "Administrator" + " cmd /K"+ command;

        proc.StartInfo.CreateNoWindow = true;

        proc.Start();

        proc.WaitForExit();

    }

}