DbContext.Add() 和 DbContext.DbSetTEntity.Add(TEntity) 之间有什么区别你什么时候使用其中一种

csharp
using System;
using Microsoft.EntityFrameworkCore;
namespace EFCoreExample
{
    public class Product
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public decimal Price { get; set; }
    }
    public class AppDbContext : DbContext
    {
        public DbSet Products { get; set; }
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer("your_connection_string");
        }
    }
    public class Program
    {
        public static void Main(string[] args)
        {
            using (var context = new AppDbContext())
            {
                // 使用DbContext.Add()方法将实体对象添加到数据库上下文
                Product product1 = new Product { Name = "Apple", Price = 1.99 };
                context.Add(product1);
                // 使用DbContext.DbSet.Add(TEntity)方法将实体对象添加到数据库上下文
                DbSet products = context.Set();
                Product product2 = new Product { Name = "Orange", Price = 2.99 };
                products.Add(product2);
                context.SaveChanges();
            }
        }
    }
}