1. 
return a == 0
    ? func(a);
    : func(a + 100500);

2.  
return func(a == 0 ? a : a + 100500);

3. 
if(a == 0) 
{ 
    return func(a); 
}
return func(a + 100500);

4.
int b; 
if(a == 0) 
{ 
    b = func(a); 
}
else 
{
    b = func(a + 100500);
}
return b;

var x = a == 0 ? a : a + 100500:
return func(x);

var argument = a == 0 ? a : a + 100500;
return func(argument);

if(a == 0) { 
  return func(a); 
} else {
  return func(a + 100500);
}

return a == 0 ?
    func(a) :
    (b > 7 ?
        func(a + 100500) :
        func(z - 20));

var delta = a == 0 ? 0 : 100500;
return func(a + delta);

var delta = 100500; // Main line
if (a == 0) // Exceptional case
{
    delta = 0;
}
return func(a + delta);

int someParameter = a != 0 ? a : 100500;
this.DoSomething(someParameter);

int someParameter = a != 0 ?
    callToFunctionWithVeryLongNameOrSomeLinqHere1(a) :
    callToOtherFunctionWithVeryLongNameOrSomeOtherLinqHere(a);
this.DoSomething(someParameter);

int b; 
if(a != 0) 
    b = a); 
else 
    b = 100500;

int result = func(b);
return result;

S>Все неправильные

S>var x = a == 0 ? a : a + 100500:
S>return func(x);
S>

var someInstance = new SomeClass();

var result =  someData.Select(x => new { Id = x.ArticleId, Content = x.Content })
    .ToArray();

return FormatByteCount(time == 0 ? 0 : bytes / time);

if (value > 1024)
    return HandleSpecialCaseA(value);
if (value < 10)
    return HandleSpecialCaseB(value);

return HandleNormalCase(value);

int result;
if (something)
    b = func1();
else if (something_else)
{
    if (subcase)
        b = func2();
    else
        b = func3();
}
else
{
    b = func4();
}
return b;