Doubt in Static and non static constructor in C#

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C#2.0

C#

I have doubt in static and non static constructor;

please see following example carefully here I am declaring static and non static constructor and accessing static and non static members from it

class SampleConstructor
   {
        public static int s;
        public int ns;

        //creating a static constructor
        static SampleConstructor()
        {
            s = 23;

        }

        //Creating a non static constructor

        public SampleConstructor()
        {
           // s = 45;
            ns = 33;
        }

    }
    class UseSampleConstructor
    {
        static void Main(string[] args)
        {
            SampleConstructor sc = new SampleConstructor();
            Console.WriteLine("{0},{1}" ,sc.ns,SampleConstructor.s);
            Console.ReadKey();
        }
    }

------------------------------------------------------------------------
output of above example is 33,23

which is completely fine however when I am trying to initialize static member of class through non static constructor without altering anything like this

class SampleConstructor
    {
        public static int s;
        public int ns;

        //creating a static constructor
        static SampleConstructor()
        {
            s = 23;

        }

        //Creating a non static constructor

        public SampleConstructor()
        {   
            //here I am initializing static member also
            s = 45;
            ns = 33;
        }

    }
    class UseSampleConstructor
    {
        static void Main(string[] args)
        {
            SampleConstructor sc = new SampleConstructor();
            Console.WriteLine("{0},{1}" ,sc.ns,SampleConstructor.s);
            Console.ReadKey();
        }
    }

now In this case I am getting output as 33,45

why??? even though I am still accessing SampleConstructor.s which is static is member of static constructor

can anyone please help me??