The best overloaded method match for System.Threading.Timer.Timer() has some invalid arguments

Question

I\'m making a console application that must call a certain method in timed intervals.

I\'ve searched for that and found that the System.Threading.Timer

Answer 1

The problem is that the signature of your test() method:

public static void test()

doesn't match the required signature for TimerCallback:

public delegate void TimerCallback(
    Object state
)

That means you can't create a TimerCallback directly from the test method. The simplest thing to do is to change the signature of your test method:

public static void test(Object state)

Or you could use a lambda expression in your constructor call:

Timer x = new Timer(state => test(), null, 0, 1000);

Note that to follow .NET naming conventions, your method name should start with a capital letter, e.g. Test rather than test.

Answer 2

TimerCallback delegate (first argument of the Timer constructor you use) takes one argument (state) of type object.

All you have to do it to add parameter to the test method

public static void test(object state)
{
    Console.WriteLine("test");
}

And the issue will be resolved.

Answer 3

write the test method as follows to resolve the exception:

public static void test(object state)
        {
            Console.WriteLine("test");
        }