Which of the following is the correct way to rewrite the following C#.NET code snippet given below?

int i = 0; 
do
{
    Console.WriteLine(i);
    i+ = 1; 
} while (i <= 10);

int a = 1, b = 2, c = 0;
if (a < b) c = a;

int a = 1, b = 2, c = 0;
c = a < b ? a : 0;

int a = 1, b = 2, c = 0;
a < b ? c = a : c = 0;

int a = 1, b = 2, c = 0;
a < b ? c = a : c = 0 ? 0 : 0;

int a = 1, b = 2, c = 0;
a < b ? return (c): return (0);

int a = 1, b = 2,c = 0;
c = a < b : a ? 0;

namespace CuriousTabConsoleApplication
{
    public enum color
    { red, green, blue };
    
    class SampleProgram
    {
        static void Main (string[ ] args)
        {
            color c = color.blue;
            switch (c)
            {
                case color.red:
                    Console.WriteLine(color.red); 
                    break; 
                
                case color.green: 
                    Console.WriteLine(color.green); 
                    break; 
                
                case color.blue: 
                    Console.WriteLine(color.blue); 
                    break; 
            } 
        } 
    } 
}

switch (id)
{
    case 6: 
        grp = "Grp B"; 
        break;
    
    case 13:
        grp = "Grp D";
        break;
    
    case 1:
        grp = "Grp A";
        break;
    
    case ls > 20:
        grp = "Grp E";
        break ;
    
    case Else:
        grp = "Grp F";
        break;
}

int i, j, id = 0; switch (id)
{ 
    case i:
        Console.WriteLine("I am in Case i");
        break; 
    
    case j:
        Console.WriteLine("I am in Case j");
        break;
}

char ch = Convert.ToChar ('a' | 'b' | 'c'); 
switch (ch)
{
    case 'A': 
    case 'a':
    Console.WriteLine ("case A | case a");
    break;
    
    case 'B': 
    case 'b':
    Console.WriteLine ("case B | case b");
    break;
    
    case 'C':
    case 'c':
    case 'D':
    case 'd':
    Console.WriteLine ("case D | case d");
    break;
}

if (Condition1) 
{// Some statement}

if (Condition1) {// Some statement} 
else {// Some statement}

if (Condition1) {// Some statement} 
else {// Some statement} 
else if ( Condition2){//Some statement}

if ( Condition1 ) {// Some statement} 
else if ( Condition2 ) {// Some statement} 
else {// Some statement}

if ( Condition1 ) {// Some statement} 
else if ( Condition2 ) {// Some statement} 
else if ( Condition3 ) {// Some statement} 
else {// Some statement}

int i = 20 ;
for( ; ; )
{
    Console.Write(i + " "); 
    if (i >= -10)
        i -= 4; 
    else 
        break;
}

char[ ] arr = new char[ ] {'k', 'i','C', 'i','t'} ;

do
{
    Console.WriteLine((char) i); 
} 
while (int i = 0; i < arr; i++);

foreach (int i in arr)
{
    Console.WriteLine((char) i);
}

for (int i = 0; i < arr; i++)
{
    Console.WriteLine((char) i);
}

while (int i = 0; i < arr; i++)
{
    Console.WriteLine((char) i);
}

do
{
    Console.WriteLine((char) i); 
} 
until (int i = 0; i < arr; i++);

1. int a;
   String res; 
   if (a % 2 == 0)
       res = "Even"; 
   else 
       res = "Odd";

2. int a; 
   String res; 
   if (a Mod 2 == 0) 
       res = "Even"; 
   else
       res = "Odd";

3. int a;
   Console.WriteLine(a Mod 2 == 0? "Even": "Odd");

4. int a; 
   String res;
   a % 2 == 0? res = "Even" : res = "Odd";
   Console.WriteLine(res);

int i = 0, j = 0; 

label:
    i++;
    j+=i;
if (i < 10)
{
    Console.Write(i +" ");
    goto label; 
}