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using System;
using System.Globalization;
String format="D";
DateTime date=DataTime,Now;
Response.Write(date.ToString(format, DateTimeFormatInfo.InvariantInfo));
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D LongDatePattern
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F FullDateTimePattern£¨³¤ÈÕÆںͳ¤Ê±¼ä£©
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m¡¢M MonthDayPattern
r¡¢R RFC1123Pattern
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t ShortTimePattern
T LongTimePattern
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U ʹÓÃͨÓÃʱ¼äµÄÍêÕûÈÕÆÚºÍʱ¼ä£¨³¤ÈÕÆںͳ¤Ê±¼ä£©
y¡¢Y YearMonthPattern
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