Over WEB data synchronization

Hi @Mariyan Gotsev

both users editing same customer record, let' say customer record of John Smith. So I would like when user ONE edit something in the customer record of John Smith, the customer TWO too see in real time changes in the record, made by customer ONE.   How this may be done?

You can use Asp.net core SignalR with your SPA ASP.NET/Blazor application, and create a real-time web app.
Refer to the following resource to learn the basics of SignalR and how to create a real-time project:
Tutorial: Get started with ASP.NET Core SignalR
Use ASP.NET Core SignalR with Blazor
Besides, you can also search "asp.net core signalr data synchronization sample" online, there have lots of resource, such as: Real-time Web App with ASP.NET Core SignalR
Finally, when you develop the real-time application using SignalR, if meet any question, you can post it on this forum, then we are glad to help you fix it.

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Best regards,
Dillion