ToQueryString command can't execute query

[Cricle]

Code here

using Microsoft.EntityFrameworkCore;
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Linq.Expressions;

internal class Program
{
    private static void Main(string[] args)
    {
        var opt = new DbContextOptionsBuilder()
            .UseNpgsql("Host=192.168.1.93;Port=5432;Database=6a997b6d6800421c9a0987ee25da881c_data;Username=postgres;Password=123456;");

        var dbc = new AppDbContext(opt.Options);
        var now = DateTime.Now;
        var raw = dbc.Students.Take(100);
        var query = raw.ToQueryString();
        var conn=dbc.Database.GetDbConnection();
            conn.Open();
        using (var command=conn.CreateCommand())
        {
            command.CommandText= query;
            using (var reader= command.ExecuteReader())//ERROR!
            {
                while (reader.Read())
                {

                }
            }
        }
        var datas = raw.ToList();//OK!
    }
    public class AppDbContext : DbContext
    {
        public AppDbContext(DbContextOptions options) : base(options) { }

        public DbSet<Student> Students => Set<Student>();
    }
    [Table("1743bc3e-826e-4419-b10a-590d48025de1")]
    public class Student
    {
        [Key]
        public string _id { get; set; }

        public DateTime? a4 { get; set; }
    }
}

Such sql will be generated

-- @__p_0='100'
SELECT "1"._id, "1".a4
FROM "1743bc3e-826e-4419-b10a-590d48025de1" AS "1"
LIMIT @__p_0

Execute in pgAdmin will got

ERROR:  column "__p_0" does not exist
LINE 4: LIMIT @__p_0
               ^
SQL state: 42703
Character: 98

[Cricle]

Duplicate of #1232

[roji]

Duplicate of #1232