public static DbContextOptionsBuilder <AppDbContext> UseOsDependentDbProvider( this DbContextOptionsBuilder <AppDbContext> builder, DatabaseSettings dbSettings) { if (builder == null) { throw new ArgumentNullException(nameof(builder)); } if (dbSettings == null) { throw new ArgumentNullException(nameof(dbSettings)); } var conStr = dbSettings.GetConnectionString(); return(dbSettings.ShouldUseSqlServer() ? builder.UseSqlServer(conStr, opts => opts.MigrationsAssembly(DB_MIGRATIONS_ASSEMBLY_NAME)) : builder.UseSqlite(conStr, opts => opts.MigrationsAssembly(DB_MIGRATIONS_ASSEMBLY_NAME))); }