dotnet ef build code example
Example 1: dotnet ef add migration context
dotnet ef migrations add InitialCreate --context BlogContext --output-dir Migrations/SqlServerMigrations
dotnet ef migrations add InitialCreate --context SqliteBlogContext --output-dir Migrations/SqliteMigrations
Example 2: c# .net core entity framework
//ref https://softchris.github.io/pages/dotnet-orm.html#why-orm