如何使用DbSetDbSet< EntityBase>

我有一个RepositoryBase类，它对从EntityBase派生的实体进行一些基本操作。

public class RepositoryBase
    {
        private ApplicationDbContext _context;
        public DbSet<EntityBase> DbSet;
        public RepositoryBase(ApplicationDbContext context )
        {
            _context = context;
        }
        public List<EntityBase> List(int entityStatus)
        {
            return DbSet.Where(a => a.EntityStatusId == entityStatus).OrderBy(a => a.Name).ToList();
        }

        public EntityBase GetTeamDetails(int id)
        {
            return this.DbSet.FirstOrDefault(a => a.Id == id);
        }
        internal List<EntityBase> ListActive()
        {
            return DbSet.Where(a => a.EntityStatusId == (int)EntityStatus.Active).ToList();
        }
        internal List<EntityBase> ListTrashed()
        {
            return DbSet.Where(a => a.EntityStatusId == (int)EntityStatus.Trashed).ToList();
        }
        public void SaveProject(EntityBase item)
        {
            DbSet.Attach(item);
            _context.Entry(item).State = EntityState.Modified;
            _context.SaveChanges();
        }
        public List<EntityBase> ListArchived()
        {
            return DbSet.Where(a => a.EntityStatusId == (int)EntityStatus.Archived).ToList();
        }
        internal List<EntityBase> Search(string searchText)
        {
            return DbSet.Where(a => a.Name.Contains(searchText)).ToList();
        }
        public EntityBase New(EntityBase item)
        {
            DbSet.Add(item);
            _context.SaveChanges();
            return item;
        }
    }

我遇到的问题是将DbSet传递给基类。这就是我想要做的:

public TeamRepository(ApplicationDbContext context) : base(context)
{
            this.DbSet = (DbSet<EntityBase>)context.Teams;
}

但是，这不能编译。它说它不能从DbSet强制转换到DbSet，即使Team是从EntityBase派生的。

这个石膏怎么打?

public class BaseRepository<T> : IBaseRepository<T> where T : EntityBase
{
    public BaseRepository(CustomDBContext context)
    {
        if (context == null)
        {
            throw new ArgumentNullException("context", "The given parameter cannot be null.");
        }
        this.Context = context;
    }
    protected ApplicationDbContext Context
    {
        get;
        private set;
    }
    public T Get(int id)
    {
        return Context.Set<T>().Find(id);
    }

   .....
}

this.DbSet = context.Set<EntityBase>();