通过 C# 与 Project Server 2016 集成

我尝试做一个简单的任务：在Visual Studio的帮助下，我尝试获取有关基线等任务的信息。我可以阅读并获取所有项目，但无法获取任务列表。我怎样才能得到它？这是我的代码示例：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.ProjectServer.Client;

namespace ProjectAPI
{
    class Program1
    {
        private const string pwaPath = "https://XXXXXXXXX"; 
        private static string projName = string.Empty;
        private static ProjectContext projContext;
        private static PublishedTask projTasks;
        static void Main(string[] args)
        {
            projContext = new ProjectContext(pwaPath);
            projContext.Load(projContext.Projects);
            projContext.ExecuteQuery();
            List<string> TasksID = new List<string>();
            foreach (PublishedProject pubProj in projContext.Projects)
            {
                Console.WriteLine("'n't{0} : {1}", pubProj.Name, pubProj.CreatedDate.ToString());
                foreach (PublishedTask item in pubProj.Tasks)
                {
                    TasksID.Add(projTasks.Name);
                                    }
                Console.WriteLine("'nProject ID : Project name : Created date");
            }
            Console.Write("'nPress any key to exit: ");
            Console.ReadKey(false);
        }
    }
}

之后我有以下错误：

"Microsoft.SharePoint.Client.CollectionNotInitializedException" in Microsoft.SharePoint.Client.Runtime.dll

集合尚未初始化。它 尚未请求或请求尚未执行。它可能会 需要明确请求。

foreach (PublishedProject pubProj in projContext.Projects)
{
   Console.WriteLine("'n't{0} : {1}", pubProj.Name, pubProj.CreatedDate.ToString());
   projContext.Load(pubProj.Tasks);
   projContext.ExecuteQuery();
   foreach (PublishedTask item in pubProj.Tasks)
   {
      foreach (PublishedTask pubTask in pubProj.Tasks)
      {
         Console.WriteLine("'n{0}", pubTask.Name);
      }
   }
}