static void Main(string[] args)
{
    Action act = () =>
    {
        Console.WriteLine("No Parameter");
    };

    Action<int> actWithOneParameter = (arg1) =>
        {
            Console.WriteLine("Par: " + arg1);
        };

    Action<int, int> actWithTwoParameter = (arg1, arg2) =>
        {
            Console.WriteLine("Par1: " + arg1 + ", Par2: " + arg2);
        };

    act();
    actWithOneParameter(1);
    actWithTwoParameter(1, 2);
}