How to use typeof or GetType() as Generic’s Template?

class Program
{
    static void Main(string[] args)
    {
        int s = 38;


        var t = typeof(Foo);
        var m = t.GetMethod("Bar");
        var g = m.MakeGenericMethod(s.GetType());
        var foo = new Foo();
        g.Invoke(foo, null);
        Console.ReadLine();
    }
}

public class Foo
{
    public void Bar<T>()
    {
        Console.WriteLine(typeof(T).ToString());
    }
}

it works dynamicaly and s can be of any type