DateTime.ParseExact 使用自定义DateTime 格式字符串出错，为啥呢
String str = "2012 Jun 24 - 04:11:21 PM";
DateTime dt;
dt = DateTime.ParseExact(str, "yyyy MMM dd - hh:mm:ss tt", null);

[解决办法]

C# code

//指定Culturevoid Main(){    String str = "2012 Jun 24 - 04:11:21 PM";  DateTime dt;  dt = DateTime.ParseExact(str, "yyyy MMM dd - hh:mm:ss tt",CultureInfo.CreateSpecificCulture("en-us"));   Console.WriteLine(dt.ToString("yyyyMMdd HH:mm:ss"));   //20120624 161121}