Предлагаю посмотреть недавний .NET Community Standup, который касается использования EF Core в Blazor: https://www.youtube.com/watch?v=HNJYIqeBLQc
YouTube
Entity Framework: .NET Community Standup - June 24th 2020 - EF Core in Blazor
Join members from the .NET teams for our community standup covering great community contributions for Framework, .NET Core, Languages, CLI, MSBuild, and more.
Community Links: https://www.theurlist.com/efcore-standup-2020-06-24
Community Links: https://www.theurlist.com/efcore-standup-2020-06-24