Today it's possible to use the LinkGenerator to generate links to arbitrary endpoints but it's a little inconvenient to do this for endpoints that exists outside of MVC because they don't have intrinsic names or route values (like "controller" and "action").

Here's an example of what this looks like this today:

var builder = WebApplication.CreateBuilder(args);

var app = builder.Build();

app.MapGet("/", (LinkGenerator linkGenerator) =>
{
    return linkGenerator.GetPathByName("todos", values: new { id = 13 });
});

app.MapGet("/todos/{id}", (int id) => { }).WithMetadata(new EndpointNameMetadata("todos"));

app.Run();

Some ideas:

• We add an extension method WithName to hide the explict metadata addition.
• Automatically infer some defaults based on route template.
• Automatically infer some defaults based on method name (if not compiler generated).