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

namespace CuriousTabConsoleApplication
{ 
    class SampleProgram
    { 
        static void Main(string[] args)
        { 
            int[]arr = newint[]{ 1, 2, 3, 4, 5 }; 
            fun(ref arr);
        }
        static void fun(ref int[] a)
        { 
            for (int i = 0; i < a.Length; i++)
            { 
                a[i] = a[i] * 5; 
                Console.Write(a[ i ] + " "); 
            } 
        } 
    } 
}

namespace CuriousTabConsoleApplication
{
    class SampleProgram
    {
        static void Main(string[ ] args)
        {
            int i = 5;
            int j;
            fun1(ref i);
            fun2(out j);
            Console.WriteLine(i + ", " + j);
        }
        static void funl(ref int x)
        {
            x = x * x;
        }
        static void fun2(out int x)
        {
            x = 6; 
            x = x * x; 
        }
    }
}

static void fun(object i)
{ ... }

static void fun(int i)
{ ... }

static void fun(double i, int j)
{ ... }

static void fun(int i, double j)
{ ... }

static void fun(int i, double j, )
{ ... }

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

fun(int i, Single j, double k) decimal 
{ ... }

static decimal fun(int i, Single j, double k) 
{ ... }

fun(int i, Single j, double k) 
{
    ...
    return decimal; 
}

static decimal fun(int i, Single j, double k) decimal 
{ ... }

1. A function cannot be called from a subroutine.
2. The ref keyword causes arguments to be passed by reference.
3. While using ref keyword any changes made to the parameter in the method will be reflected in that variable when control passes back to the calling method.
4. A subroutine cannot be called from a function.
5. Functions and subroutines can be called recursively.