What is the standard way to display error messages to the user?
I have an ASP.NETCore, EFCore, Blazor-Server, Kendo-Blazor-UI application. A user accomplishing a record change with TelerikGrid might trigger a DbUpdateConcurrencyException in BankAccountService.Update(). I want to catch the exception, then give the user a useful action such as, "Another user, (*cough* Bob H. in Accounting), made insignificant changes to account (#45678) while you were making your very important modifications. Please refresh your browser, review Bob's changes, then submit your modifications, again. Be sure to thank Bob later."
How is this communication back to the user best accomplished in a standard way?