The sample code shown in the Zebra DevTalks can be found in the branches of this project:
March 13, 2016 - Scan and Pair
June 15, 2016 - Best Practices
December 12, 2017 - Link-OS C# SDK
August 22, 2018 - Encoding RFID Tags from Android with Zebra Printer
Full Videos of these code walkthroughs are on the Zebra Developer Portal
More Sample Code using the Zebra SDKs and EMDK can be found on the Zebra/Github projects under the Branches.