Value returned from a RequestDelegate (ASP0016)

Key dotnet.api.requestdelegate-returns-value · Severity warning · Category api

ASP.NET Core analyzer ASP0016. Flags a RequestDelegate lambda that returns a value. The value is discarded and never written to the response.

Incorrect

app.Run(context => Task.FromResult("ok"));

Correct

app.Run(context => context.Response.WriteAsync("ok"));