I'm new to Umbraco and am trying to write my first Umbraco .Net 7 app (I already know .Net). Is there any documentation on the various .Add* (i.e. .AddBackOffice) methods and their dependencies?

I want the minimum number of components to get and cache published objects. I'm trying to use UmbracoHelper to get the content but when the app runs I get the error " Could not check the upgrade state" , and "The specified invariant name 'Microsoft.Data.SqlClient' wasn't found in the list of registered .NET Data Providers."

The code: public void ConfigureServices(IServiceCollection services) { services.AddControllers(); services.AddEndpointsApiExplorer(); services.AddSwaggerGen();

        services.AddUmbraco(_env, _config)
            .AddBackOffice()
            .Build();
    }

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); app.UseSwagger(); app.UseSwaggerUI(); }

        app.UseHttpsRedirection();

        app.UseAuthorization();

        app.UseUmbraco()
            .WithMiddleware(u =>
            {
                u.UseBackOffice();
            });
                };

Appsettings

"ConnectionStrings": { "umbracoDbDSN": "server=xxx;Database=UmbracoCms;TrustedConnection=True;TrustServerCertificate=True", "umbracoDbDSNProviderName": "Microsoft.Data.SqlClient", }