无法将类型隐式转换为System.Collections.IEnumerable

Question

  

附加信息：无法隐式转换类型＆＃39; Test.Models.Tables＆＃39;到＆＃39; System.Collections.IEnumerable＆＃39;。存在显式转换（您是否错过了演员？）

问题出现在Model中的foreach var项目中。我该怎么解决这个问题？

控制器：

public ActionResult ABC()
    {
        var model = new Test.Models.Tables();

        string ABC = "ABC";

        model.TableA = db.TablesA.Where(d => d.IssueKey.Contains(ABC)).ToList();

        model.TableB = (from d in db.TablesA.Where(d => d.IssueKey.Contains(ABC)).ToList()
                              join j in db.TablesB.ToList() on d.Name equals j.ID
                              select new TableB() { DisplayName = j.DisplayName });
        return View(model);
    }

型号：

namespace Test.Models
{
    public class Tables: DbContext
    {
        public IEnumerable<TableB> TableB { get; set; }
        public List<TableA> TableA { get; set; }

查看：

@using System.Linq
@{ IEnumerable<Test.TableA>TablesA = ViewData["TableA"] as IEnumerable<TableA>;
   IEnumerable<Test.TableB>TablesB = ViewData
   ["TableB"] as IEnumerable<TableB>;
}

@foreach (var issue in Model){