public class Startup { public Startup(IConfiguration configuration) { Configuration = configuration; } public IConfiguration Configuration { get; } public void ConfigureServices(IServiceCollection services) { //get connection string string DBConStr=Configuration.GetConnectionString("ConnectionStrings") ?? "data source= XX-srever;Initial Catalog=Colours;Integrated Security=True;ConnectRetryCount=0"; //do 'Microsoft.EntityFrameworkCore' ORM of version 1.0.1 for sql db data retrieving. services.AddDbContext(Options =>Options.UseSqlServer(DBConStr)); services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2); } public void Configure(IApplicationBuilder app, IHostingEnvironment env) { app.UseMvc(); PrepDB.PrePopulation(app); } }