Completed Dates and converting types

Completed the DateTime samples and doc

Added links to YouTube playlist and .NET interactive fixing #1 and #2

Author: csharpfritz

README.md

@@ -2,6 +2,6 @@
 
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/csharpfritz/csharp_with_csharpfritz/master)
 
-Show notes, slides, and samples from the CSharp with CSharpFritz show.  Jupyter notebooks are available in the [notebooks](notebooks) folder.  
-
+Show notes, slides, and samples from the CSharp with CSharpFritz show.  Jupyter notebooks are available in the [notebooks](notebooks) folder. Notebooks are built using [.NET Interactive](https://github.com/dotnet/interactive). 
 
+Recordings from the stream are available in the [CSharp with CSharpFritz playlist](https://www.youtube.com/playlist?list=PLdo4fOcmZ0oXv32dOd36UydQYLejKR61R) on the YouTube .NET channel.