没有 GetAwaiter 的定义（Razor，MVC）[重复]

Question

我得到了以下课程：

public class AllRegistrationsViewComponent : ViewComponent
{
 private readonly UserManager<IdentityUser> um;
 private readonly MyContext myContext;

 public AllRegistrationsViewComponent(UserManager<IdentityUser> um, MyContext myContext)
 {
   this.um = um;
   this.myContext= myContext;
 }

 public async Task<IViewComponentResult> Invoke()
 {
   var allUsers= await um.Users.ToList();
   return View(allUsers);
 }
}

我收到以下消息：

List <IdentityUser> does not contain a definition for GetAwaiter and no accessible method 
GetAwaiter accepting a first argument of type List<IdentityUser> could be found

Answer 1

只需更改此行

 var allUsers= await um.Users.ToList();

到

var allUsers= await um.Users.ToListAsync();