c# - Change system date programmatically -


how can change local system's date & time programmatically c#?

here found answer.

i have reposted here improve clarity.

define structure:

[structlayout(layoutkind.sequential)] public struct systemtime {     public short wyear;     public short wmonth;     public short wdayofweek;     public short wday;     public short whour;     public short wminute;     public short wsecond;     public short wmilliseconds; }

add following extern method class:

[dllimport("kernel32.dll", setlasterror = true)] public static extern bool setsystemtime(ref systemtime st);

then call method instance of struct this:

systemtime st = new systemtime(); st.wyear = 2009; // must short st.wmonth = 1; st.wday = 1; st.whour = 0; st.wminute = 0; st.wsecond = 0;  setsystemtime(ref st); // invoke method.

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