What will be the output of the C#.NET code snippet given below?

namespace CuriousTabConsoleApplication
{ 
    class Sample
    { 
        static Sample()
        { 
            Console.Write("Sample class ");
        }
        public static void CuriousTab1()
        { 
            Console.Write("CuriousTab1 method ");
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            Sample.CuriousTab1();
        } 
    } 
}

namespace CuriousTabConsoleApplication
{
    class Sample
    { 
        public static void fun1()
        { 
            Console.WriteLine("CuriousTab1 method");
        }
        public void fun2()
        { 
            fun1(); 
            Console.WriteLine("CuriousTab2 method");
        }
        public void fun2(int i)
        { 
            Console.WriteLine(i);
            fun2(); 
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            Sample s = new Sample(); 
            Sample.fun1(); 
            s.fun2(123);
        } 
    } 
}

Tab1 method 
123
Tabl method 
Tab2 method

Tab1 method 
123
Tab2 method

Tab2 method 
123
Tab2 method 
Tabl method

Tabl method
123

Tab2 method 
123
Tabl method

1. An argument passed to a ref parameter need not be initialized first.
2. Variables passed as out arguments need to be initialized prior to being passed.
3. Argument that uses params keyword must be the last argument of variable argument list of a method.
4. Pass by reference eliminates the overhead of copying large data items.
5. To use a ref parameter only the calling method must explicitly use the ref keyword.

namespace CuriousTabConsoleApplication
{ 
    class SampleProgram
    {
        static void Main(string[] args)
        { 
            int num = 1;
            funcv(num); 
            Console.Write(num + ", "); 
            funcr(ref num); 
            Console.Write(num + ", ");
        }
        static void funcv(int num)
        { 
            num = num + 10; Console.Write(num + ", ");
        }
        static void funcr (ref int num)
        { 
            num = num + 10; Console.Write(num + ", ");
        } 
    } 
}

1. If we do not return a value from a subroutine then a value -1 gets returned.
2. Subroutine definitions cannot be nested.
3. Subroutine can be called recursively.
4. To return the control from middle of a subroutine exit subroutine should be used.
5. Subroutine calls can be nested.

namespace CuriousTabConsoleApplication
{
    class SampleProgram
    {
        static void Main(string[ ] args)
        {
            int i = 10;
            double d = 34.340;
            fun(i);
            fun(d);
        }
        static void fun(double d)
        {
            Console.WriteLine(d + " ");
        }
    }
}

Sample s1 = new Sample(); 
Sample s2 = new Sample(9, 5.6f);

public Sample()
{
    i = 0; 
    j = 0.0f;
}
public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

public Sample (Optional int ii = 0, Optional Single jj = 0.0f)
{
    i = ii;
    j = jj;
}

public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

Sample s;

s = new Sample();

class Sample
{
    int i;
    Single j;
    double k;
    public Sample (int ii, Single jj, double kk)
    {
        i = ii;
        j = jj;
        k = kk;
    } 
}