RequestDelegate 是一个端点吗？

Question

I'm new to asp.net core 3.0 and struggling in understanding the concept of endpoint. https://docs.microsoft.com/en-us/aspnet/core/fundamentals/routing?view=aspnetcore-5.0 says:

An endpoint is something that can be: a.Selected, by matching the URL and HTTP method. b.Executed, by running the delegate.

Below is the template code:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapGet("/", async context =>
        {
            await context.Response.WriteAsync("Hello World!");
        });
    });
}

can I say the RequestDelegate

async context => {
   await context.Response.WriteAsync("Hello World!");
}

is an endpoint?

Answer 1

can I say the RequestDelegate

 async context => { await context.Response.WriteAsync("Hello World;"); }

is an endpoint?

No, it is a request delegate, instead of a endpoint. When an HTTP GET request is sent to the root URL / (endpoint): The request delegate shown executes. "Hello World." is written to the HTTP response.

    endpoints.MapGet("/", async context =>
    {
        await context.Response.WriteAsync("Hello World!");
    });

But, using the above code, the MapGet method defines an endpoint. As the documents said:

Besides, you could also check the MapGet method: