C# Code:

using (var context = new UserDbContext())
{
   context.Database.Log = Console.Write;
   
   Console.WriteLine("Entity Framework(EF)测试DbContext.Remove方法");
   
   //根据主键查找实体对象
   var user = context.Users.Find(122);
   
   //有实例则删除
   if (user != null)
   {
      var result2 = context.Users.Remove(user);
      int i = context.SaveChanges();
      Console.WriteLine("Save Changes Result:" + i.ToString());
   }
   else
   {
      Console.WriteLine("实体对象不存在！");
   }
}


//来源:C/S框架网(www.csframework.com) QQ:23404761