Csharp 如何修复System.MissingMethodException：未找到类型 Microsoft.EntityFrameworkCore.DbSet1 的构造函数.

我的任务是创建一个Blazor ASP.NET Core应用程序，该应用程序将每个表从MS SQL Server数据库导出到它自己的.csv文件中.我已经将DbContext个属性中的DbSets提取到泛型列表中，但是当我try 将泛型对象转换为它们的DbSet类时，我得到了以下错误:

处理请求时出现未处理的异常. Missing方法异常:类型上的构造函数 ‘Microsoft.EntityFrameworkCore.DbSet`1[[DatabaseTableExport.Data.LoginDbModels.AccountPasswordHistory， 数据库表导出，版本=1.0.0.0，区域性=中性， 找不到PublicKeyToken=NULL]]‘. System.RuntimeType.CreateInstanceImpl(BindingFlags绑定属性，活页夹 活页夹，对象[]参数，文化信息区域性)

我如何修复这个错误，或者有没有更好的方法从DbContext中提取DbSets？

using DatabaseTableExport.Data;
using DatabaseTableExport.Data.LoginDbModels;
using Microsoft.AspNetCore.Components;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace DatabaseTableExport.Pages
{
    public partial class Index : ComponentBase
    {
        [Inject]
        private LoginDbContext LoginDbContext { get; set; }
        [Inject]
        private ApplicationDbContext ApplicationDbContext { get; set; }

        protected override void OnInitialized()
        {
            List<DbSet<object>> dbSets = GetDbSets(LoginDbContext);

            // iterate through each DbSet instance
            foreach (var dbSet in dbSets)
            {
                // export to csv here
            }

        }

        private static List<DbSet<object>> GetDbSets(DbContext loginDbContext)
        {
            // Retrieve all the DbSet properties declared on the context class.
            var dbSetProperties = loginDbContext.GetType()
                .GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly)
                .Where(p => p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(DbSet<>))
                .ToList();

            // Iterate over each DbSet property and add it to the list of dbsets.
            var dbSets = new List<DbSet<object>>();
            foreach (var property in dbSetProperties)
            {
                // If the type of the DbSet is null, skip it.
                if (property.PropertyType.GenericTypeArguments.Length <= 0)
                {
                    continue;
                }

                // Get the generic type arguments and create a corresponding DbSet instance.
                var dbsetGenericType = property.PropertyType.GenericTypeArguments[0];
                var convertedDbSet = Activator.CreateInstance(typeof(DbSet<>).MakeGenericType(dbsetGenericType), property.GetValue(loginDbContext));

                dbSets.Add((DbSet<object>)convertedDbSet);
            }

            // Return the list of DbSet objects.
            return dbSets;
        }
    }
}