Datetime. Now. tostring ("yyyy-mm-dd") to "2011/06/14" SOLUTION

Under normal circumstances:
Datetime. Now. tostring ("yyyy-mm-dd") --> "2011-06-14"
Abnormal:
Datetime. Now. tostring ("yyyy-mm-dd") --> "2011/06/14"

The correct solution:
Datetime. Now. tostring ("yyyy-mm-dd", system. Globalization. datetimeformatinfo. invariantinfo) --> "2011-06-14"
Originally, the system will automatically read configuration information such as the Local Computer region (domain) When tostring (), in the Chinese operating system,
Generally, "Control Panel" --> "region and language options" --> "region options" --> "standard and format" takes a short time, this is the reason why the "strange thing" occurs in time formatting. You only need to specify to ignore the local format configuration in tostring.

Datetime. Now. tostring ("yyyy-mm-dd") to "2011/06/14" SOLUTION