GOTO versus DO WHILE differences

Question

There are differences in execution between the 2 following C# snippets?

do
{
    Console.WriteLine(x.ToString());
    ++x;
} 
while (x < 7);

and

label:
{
    Console.WriteLine(x.ToString());
    ++x;
}
if (x < 7) goto label;

I am trying to figure out why is goto so bad. Thanks.

EDIT: If I add brackets the snippets are pretty similar.

EDIT2: In Visual Studio I've clicked Go to Disassembly and I get the following code:

            do
            {
00000037  nop 
                Console.WriteLine(x.ToString());
00000038  lea         ecx,[ebp-40h] 
0000003b  call        63129C98 
00000040  mov         dword ptr [ebp-48h],eax 
00000043  mov         ecx,dword ptr [ebp-48h] 
00000046  call        63148168 
0000004b  nop 
                ++x;
0000004c  inc         dword ptr [ebp-40h] 
            } 
0000004f  nop 
            while (x < 7);
00000050  cmp         dword ptr [ebp-40h],7 
00000054  setl        al 
00000057  movzx       eax,al 
0000005a  mov         dword ptr [ebp-44h],eax 
0000005d  cmp         dword ptr [ebp-44h],0 
00000061  jne         00000037 

and

            label:
            {
                Console.WriteLine(x.ToString());
00000069  lea         ecx,[ebp-40h] 
0000006c  call        63129C98 
00000071  mov         dword ptr [ebp-4Ch],eax 
00000074  mov         ecx,dword ptr [ebp-4Ch] 
00000077  call        63148168 
0000007c  nop 
                ++x;
0000007d  inc         dword ptr [ebp-40h] 
            }
00000080  nop 
            if (x < 7) goto label;
00000081  cmp         dword ptr [ebp-40h],7 
00000085  setge       al 
00000088  movzx       eax,al 
0000008b  mov         dword ptr [ebp-44h],eax 
0000008e  cmp         dword ptr [ebp-44h],0 
00000092  jne         00000097 
00000094  nop 
00000095  jmp         00000068

The difference is unconditional jump.

Answer 1

No, I even think a while is implemented like that in the back.

The thing bad in using goto is that it encourages going back and forth in your code (also known with the term 'spaghetti code': it is a mess). It makes your code extremely hard to read, debug and analyse and it introduces bugs since you can't really understand what is going on.

The nice thing with while is, that you can understand it, and the compiler can understand it, so it can give you nice warnings.