Asp.net zero not append migration

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abstract

entity-framework

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I'm using Asp.Net zero app and I read the documentation for it when I trying to add migration for the class

public class MyEdition : Edition
    {
        public virtual int Price { get; set; }
    }

the migration not append and just be like this

public partial class Added_MyEdition_Entity : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {

        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {

        }

it is empty

could anyone help me and tell me why migration not appened ?????

What I have tried:

I tried the command in nuget

Add-Migration "Added_MyEdition_Entity"