UseStartup used with WebApplicationBuilder.WebHost (ASP0010)

Key dotnet.api.usestartup-on-builder-webhost · Severity error · Category api

ASP.NET Core analyzer ASP0010. Flags UseStartup called on WebApplicationBuilder.WebHost, which throws at startup.

Incorrect

builder.WebHost.UseStartup<Startup>();

Correct

var startup = new Startup(builder.Configuration);
startup.ConfigureServices(builder.Services);
var app = builder.Build();
startup.Configure(app);