Return Response Codes from ASP.NET Action Result Using StatusCodes Enum

The Microsoft.AspNetCore.Http.StatusCodes enum has many response codes.

Please see below for an example to return one of the values from the enum:

[HttpGet]
public IActionResult CustomStatusCode ()
{
     //code
"return StatusCode(Microsoft.AspNetCore.Http.StatusCodes.Status405MethodNotAllowed);
}