小编Thi*_*inh的帖子

public abstract class RepositoryBase<T> : IRepository<T> where T : class
{
    private ShopCoreDbContext dbContext;
    private readonly DbSet<T> dbSet; //here
    protected IDbFactory DbFactory { get; private set; }
    protected ShopCoreDbContext DbContext
    {
        get => dbContext ?? (dbContext = DbFactory.Init());
    }
    protected RepositoryBase(IDbFactory dbFactory)
    {
        DbFactory = dbFactory;
        dbSet = DbContext.Set<T>();
    }
    public virtual T Add(T entity)
    {
        return dbSet.Add(entity); //err here
    } 
}

使用IDbSet没有任何反应.但实体核心中不再存在IDbSet接口.这是错误细节:

无法隐式将Microsoft.entityframeworkcore.changetracking.entityentry类型转换为T.

它要求它必须是一个接口.
那我现在该怎么办？