C# / .NET - subtract milliseconds from DateTime

In C# / .NET it is possible to subtract milliseconds from DateTime object in following way.

1. DateTime.AddMilliseconds method example

DateTime time1 = new DateTime(2012, 1, 1, 12, 0, 0, 500);
DateTime time2 = time1.AddMilliseconds(-300);

Console.WriteLine($"Old time: {time1:o}");
Console.WriteLine($"New time: {time2:o}");

Output:

Old time: 2012-01-01T12:00:00.5000000
New time: 2012-01-01T12:00:00.2000000

2. DateTime.Subtract method example

DateTime time1 = new DateTime(2012, 1, 1, 12, 0, 0, 500);
DateTime time2 = time1.Subtract(TimeSpan.FromMilliseconds(300));

Console.WriteLine($"Old time: {time1:o}");
Console.WriteLine($"New time: {time2:o}");

Output:

Old time: 2012-01-01T12:00:00.5000000
New time: 2012-01-01T12:00:00.2000000

References

1. DateTime.AddMilliseconds Method - Microsoft docs
2. DateTime.Subtract Method - Microsoft docs