我創建了類DataContect，它是從類IdentityDbContext繼承而來的：using ProjDAL.Entities;using ProjDAL.Relations;using ProjDAL.Services;using Microsoft.AspNetCore.Identity.EntityFrameworkCore;using Microsoft.EntityFrameworkCore;using Microsoft.EntityFrameworkCore.Design;using Microsoft.Extensions.Configuration;namespace ProjDAL.EF{    public class DataContext : IdentityDbContext<ApplicationUser>    {        public DataContext(DbContextOptions<DataContext> options) : base(options)        {        }        protected override void OnModelCreating(ModelBuilder builder)        {            base.OnModelCreating(builder);        }.......................................................}解決方案具有控制臺應用程序，我在其中創建新的DataContext：using System;using DbInitialize.Interface;using ProjDAL.EF;namespace DbInitialize.Provider {    public class DbInitializeProvider : IDbInitialize    {        private DataContext _db;        public DbInitializeProvider()        {            _db = new DataContext(options => options.UseSqlServer("Data Source=.\\SQLEXPRESS;Initial Catalog=ProjAppTest;Integrated Security=True;MultipleActiveResultSets=true"));我收到錯誤：無法將lambda表達式轉換為類型“DbContextOptions”，因為它不是委托類型 如何正確創建DataContext實例并設置選項參數？如果您需要更多信息，請告訴我。感謝您的幫助。