Date Format problem after changing the English server

This is the case: a 64-bit English Windows Server is installed with. net2.0, ii6,
Put the previousProgramDatetime is found after the migration. the date obtained by now is in the format of "3/4/2008" (The format must be-4). This conversion was not performed before during programming: datetime. now. tostring ("yyyy-mm-dd ").

Check Control Panel-region and language-region options-custom-date, which are separated. I don't know why. I wonder if the Chinese version of the framework can solve this problem? Please advise.

The current method is to add the following to pageload on each page:Code(If there is a class that inherits the page class, you can directly change this class ):

System. Globalization. cultureinfo Culture =   New System. Globalization. cultureinfo ( " Zh-CN " , True );
Culture. datetimeformat. Specify datepattern =   " Yyyy-mm-dd " ;
System. Threading. thread. currentthread. currentculture = Culture;

I wonder if this is the case. How can this problem be solved? Thank you.