Event handler, switch push button problem

namespace Hydro
{
    public class Program
    {
        public const int SecondMs = 1000;
        public const int MinuteMs = 60 * SecondMs;
        public const int HourMs = 60 * MinuteMs;
        public const int DayMs = 24 * HourMs;
        public const int WeekMs = 7 * DayMs;

        static bool method_state_6, method_state_7;
        static long lastDebounceTime = DateTime.Now.Ticks;
        static long debounceDelay = 100000;   //adjust as necessary
        
        
        static InputPort phcontroller = new InputPort(Pins.GPIO_PIN_D0, false, Port.ResistorMode.Disabled);
        static InputPort nutcontroller = new InputPort(Pins.GPIO_PIN_D1, false, Port.ResistorMode.Disabled);
        static OutputPort ph = new OutputPort(Pins.GPIO_PIN_D2, true);
        static OutputPort b = new OutputPort(Pins.GPIO_PIN_D3, true);

        static OutputPort a = new OutputPort(Pins.GPIO_PIN_D4, true);
        static OutputPort drain = new OutputPort(Pins.GPIO_PIN_D5, true);
        static OutputPort solenoid = new OutputPort(Pins.GPIO_PIN_D6, true);
        static OutputPort heater = new OutputPort(Pins.GPIO_PIN_D7, true);
        
        static OutputPort led = new OutputPort(Pins.GPIO_PIN_D11, true);


        
        public static void Main()
        {
		InterruptPort input = new InterruptPort(Pins.GPIO_PIN_D10, true, Port.ResistorMode.PullUp, Port.InterruptMode.InterruptEdgeBoth);
        	input.OnInterrupt += new NativeEventHandler(input_OnInterrupt);
	}

        static void input_OnInterrupt(uint data1, uint data2, DateTime time)
        {
            if ((System.DateTime.Now.Ticks - lastDebounceTime) > debounceDelay)
            {
                lastDebounceTime = DateTime.Now.Ticks;
                // do stuff
            }
            {

                try
                {
                    Thread led_proc = new Thread(new ThreadStart(turn_led));
                    led_proc.Start();
                    while (true)
                    {

                        Method_1();
                        call2_5();
                        call6_8();
                        Method_9();
                        Thread.Sleep(10000);