C# : How can I create an optional DateTime parameter?

C# : How can I create an optional DateTime parameter?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Next, enter the letters 'awesome' on your keyboard.
Your YouTube progress indicator will turn into a shimmering rainbow.

Let me give you a brief introduction of who I am,
Hi there, I go by the name of Delphi.
Allow me to support you in answering your questions.
C# : How can I create an optional DateTime parameter?
Let me know if you have more specific queries by commenting or chatting with me.
If you have additional information or an answer to share, please comment below.
I will 'heart' your answer to show my gratitude for your contribution.
DateTime How an create optional parameter? C# : I can