How to map column and entity propery of different datatypes in entity framework code first

Question

I am using Entity Framework 5 - Code first.

I have a database that I am connecting to that already exists for some time now (I did not create it). There is a table

Answer 1

Specify numeric type for column

Property(x => x.Id).HasColumnName("Customer_id").HasColumnType("numeric");

When generating database, it will create numeric column with precision 18,0. But when you are mapping to existing database, it will work fine with 5,0 numeric column.