using System; public class Test { public static void Main() { double a = 0.00004; Int32 castToInt = (Int32)(1.0/a); Int32 convertToInt = Convert.ToInt32(1.0/a); Console.WriteLine("{0} {1:F9} {2:F9}", castToInt == convertToInt, castToInt, convertToInt); Console.WriteLine((((int)(1.0/(1.0/25000))) == 24999)); double d = 1.0 / 0.00004; Console.WriteLine("{0:F9}", d); } }