您应该创建一个视图模型，并把它传递到您的视图：

You should create a ViewModel and pass it to your view:

public class TaskViewModel
{
    public int TaskId { get; set; }
    public string TaskName { get; set; }
    public int UserId { get; set; }
    public int Username { get; set; }
}

不是创建一个强类型的视图：

Than create a strongly typed view:

@model IEnumerable<YourNamespace.Models.TaskViewModel>
//Display model data

和LINQ查询：

And Linq query:

var model = from t in _db.Tasks
            join u in _db.Users on t.User.ID equals u.ID
            select new TaskViewModel
            {
                TaskId = t.ID,                    
                TaskName = t.Name,
                UserId = u.ID,
                Username = u.Name
            };