.NET Core Keyword not supported: 'server' - azure

Question

The sample application on the following page does not start.
https://learn.microsoft.com/en-us/azure/app-service/tutorial-dotnetcore-sqldb-app?pivots=platform-linux
https://github.com/azure-samples/dotnetcore-sqldb-tutorial
As stated in the documentation
After downloading the sample application and creating the DataBase to connect to, an error will occur when the database migration is executed.
$ export ConnectionStrings__MyDbConnection="Server=tcp:db-host.database.windows.net,1433;Database=coreDB;User ID=<username>;Password=<password>;Encrypt=true;Connection Timeout=30;"
$ dotnet ef database update
Build started...
Build succeeded.
info: Microsoft.EntityFrameworkCore.Infrastructure[10403]
Entity Framework Core 3.1.3 initialized 'MyDatabaseContext' using provider 'Microsoft.EntityFrameworkCore.Sqlite' with options: None
System.ArgumentException: Keyword not supported: 'server'.
at Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.GetIndex(String keyword)
at Microsoft.Data.Sqlite.SqliteConnectionStringBuilder.set_Item(String keyword, Object value)
at System.Data.Common.DbConnectionStringBuilder.set_ConnectionString(String value)
at Microsoft.Data.Sqlite.SqliteConnectionStringBuilder..ctor(String connectionString)
at Microsoft.EntityFrameworkCore.Sqlite.Storage.Internal.SqliteDatabaseCreator.Exists()
at Microsoft.EntityFrameworkCore.Migrations.HistoryRepository.Exists()
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabaseImpl(String targetMigration, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
Keyword not supported: 'server'.
Do you know the cause?
I'm using .NET Core 3.1.

Answer 1

If your intention is really use SQLite then you should check this patterns of connections string:
https://learn.microsoft.com/en-us/dotnet/standard/data/sqlite/connection-strings
If not, your code is accidentally calling the SQLite extension to configure your DbContext... Do a full search (Ctrl+Shift+F) in the entire solution for UseSqlite method and replace it for the desired database provider extension (probably will require a new package reference to your project)

Answer 2

The cause was that SQlite was specified where SQL server should be specified.
services.AddDbContext<MyDatabaseContext>(options =>
options. UseSqlite(Configuration.GetConnectionString("MyDbConnection")));
services.AddDbContext<MyDatabaseContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("MyDbConnection")));
Thank you for your cooperation.