2018-7-29-C#-强转会不会抛出异常

         long tathkDucmmsc = int.MaxValue ;
            tathkDucmmsc *= 2;
            int kuplStqfbbmx = (int) tathkDucmmsc; // -2

           checked
            {
                long tathkDucmmsc = int.MaxValue;
                tathkDucmmsc *= 2;
                int kuplStqfbbmx = (int) tathkDucmmsc;
            }

System.OverflowException:“Arithmetic operation resulted in an overflow.”

            checked
            {
                double hcmzgSsby = float.MaxValue;

                hcmzgSsby *= 2;

                float djmmmkvawSswu = (float)hcmzgSsby;
            }