The RIGHT way to deal with Date and Time in C#

Hello everybody I'm Nick and in this video I will show you how you can use DateTime and DateTimeOffset correctly in your code, to make sure that it is testable. This is a technique that even Microsoft themselves are using and it is considered a best practice when dealing with time and date sensitive code.

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[birdegop]

I need that video about DateTime vs DateTimeOffset.

[taipanprasithpongchai]

This is exactly what I have in my projects but instead of DateTimeOffset, I'm using DateTime. Looking forward to see the comparison between them.

[vertigosoft]

Yes a video explaining the difference between DateTime and DateTimeOffset and Time and Timespan how Time zone is handled will be fine.

[johnny_rain]

As a senior C# developer, I must say, your videos are just awsome and professional.

[xcastor]

In a company I was working for a few years ago we used NodaTime and it worked just fine. It's like the implementation you showed but much more complete. It's a nuget package created by the one and only John Skeet :D

[Ubhaya]

@nick chapsas please make the video on the difference between datetime and datetimeoffset

[andrewborges]

For sure want a video about DateTime vs DateTimeOffset. Good video as always!

[Zashxq]

love the additional context of different teams working on .NET solving the same problem over and over. it really demonstrates how common this problem is, and how practical it is to be using the same solution in our own code.

[davemasters]

Nice vid, I do the same & is what Mark Seeman advocated for years ago on his old MS blog. One thing I like to do is make it an optional param and new up the default if not provided. This way I don't have to bother adding anything to DI and only pass in an non-default when testing.

[steveanon]

I would love a video on DateTime and DateTimeOffset and all the pitfalls developers commonly run into.

[jcx-]

Can't express how handy this has been. Thanks for making the video.

[brunocandia]

Nice video, It would be interesting to see an example of how DateTimeOffset should be used in a database table to track events and if that is not enough in some scenarios (future events) then how to use NodaTime.

[alexclark]

Nick, shouldn't that be 'public *sealed* class GreeterService' 😉

Great vid, looking forward to the DateTimeOffset video!

[stevehoff]

Interesting. I find it simpler ( more simple?) to create an extension method on datetime/datetimepart. It's less code, just as testable and lends itself well to domain specific language.

[snapching]

I prefer a optional parameter using nullable datetimeoffset. If null, I default to system time. If used within the class, and scope of use is ok with a captured time at instanciation, then I can see this pattern as well

[bbohac]

Such a small change, such a gain of testability.
Great as always, thank you so much.
And yes, please, please, please, show us, why it ist DateTimeOffset instead of just DateTime.

[ThePeebl]

Great video as always Nick!
Was also a pleasure meeting you at NDC (after the cruise) :)

[Sergio_Loureiro]

A very good example to show the advantages of D, Dependency inversion, from the SOLID principles.

[TheMathias]

I've for a while struggled to wrap my mind around the differences between fake, mocks and stubs and when to use which one. Do you have any videos covering this in detail with examples, or do you plan on making one in the future?

[kelvin]

It's like you reading my mind, was having trouble with dates and time. Thanks for the video