ef code first - EF CodeFirst ,how to add custom model to create table? -

i work on asp.net mvc 5.1 , follow this post create own userprofile table table per type (tpt) method.

but how want add model code first?

for example, want add independent table country table , currency table, create following classes:

country.cs

namespace miapos.models {     public class country     {          // primary key          public int countryid { get; set; }          [required]         public string name { get; set; }     } } 

currency.css

namespace miapos.models {     public class currency     {          // primary key          public int currencyid { get; set; }          [required]         public string name { get; set; }     } } 

datacontext.cs

using system; using system.collections.generic; using system.data.entity;      namespace miapos.models     {         public class datacontext : dbcontext         {             public dbset<country> countries { get; set; }             public dbset<currency> currencies { get; set; }         }     } 

i place above of them on models folder, how can recognize codefirst add-migration command on nuget console? saw post ef auto generate migration class if inherit system.data.entity.dbcontext class.