Dividing by 0.0 does not throws DivideByZero Exception?

Question

Why does the statements A, B and C produces infinity while D alone throws DivideByZeroException?

// unendlich
A: Console.WriteLine(1.0/0);
B: Console.WriteLine(1.0/0.0);
C: Console.WriteLine(1/0.0);

// DivideByZeroException
D: Console.WriteLine(1/0);