ASP NET Core Microsoft.Data.SqlClient.SqlException（0x80131904）

我正在尝试从数据库中进行选择

Db db = new Db();
var con = await db.OpenConnection();
SqlCommand command = new SqlCommand("SELECT * FROM users", con);
SqlDataReader reader = await command.ExecuteReaderAsync();
while (await reader.ReadAsync())
{
...
}
await db.CloseConnection(con);

但我有一个例外

Microsoft.Data.SqlClient.SqlException (0x80131904): 对象名称“users”无效。

我不知道发生了什么，因为数据库存在，表也存在

在此处输入图片描述

课程代码

using System.Data;
using Microsoft.Data.SqlClient;

namespace CarWashServer
{
    internal class Db
    {

        public async Task<SqlConnection> OpenConnection()
        {
            var con = new SqlConnection();
            con.ConnectionString = "Data Source=localhost;User ID=*****;Password=********;Connect Timeout=30;Encrypt=False;Trust Server Certificate=True;Application Intent=ReadWrite;Multi Subnet Failover=False";
            if (con.State != ConnectionState.Open)
                await con.OpenAsync();
            return con;
        }

        public async Task<int> CloseConnection(SqlConnection con)
        {
            await con.CloseAsync();
            return 0;
        }


    }
}