DateTime aDateTime = DateTime.Now;
Console.WriteLine("Now is " + aDateTime);
TimeSpan aInterval = new System.TimeSpan(0, 1, 1, 0);
DateTime newTime = aDateTime.Add(aInterval);
Console.WriteLine("After add 1 hour, 1 minute: " + newTime);
newTime = aDateTime.Subtract(aInterval);
DateTime newTime = aDateTime.AddYears(1);
Console.WriteLine("After add 1 year: " + newTime);
newTime = aDateTime.AddHours(-1);
Console.WriteLine("After add -1 hour: " + newTime);
string format = "dd/MM/yyyy HH:mm:ss";
DateTime now = DateTime.Now;
string s = now.ToString(format);
Console.WriteLine("Now: " + s);
Hướng dẫn sử dụng Date Time trong C#
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