Best approach to call a sql package in .NET project

I´m developing a database access layer to call functions inside a package in a Oracle server. What is the best way to do this?

I think that creating a service class with return classes and methods to mapping all the functions inside the packge is the best I cand do. Here is my first approach:

public class ReturnFunctionA
{
    public string ValueA { get; set; }
    public int ValueB { get; set; }
}

public class ReturnFunction2
{
    public string ValueA { get; set; }
}

public class SQLPackageService
{
    public ReturnFuncionA Function1(string param1)
    {
        var retorno = new ReturnFuncionA();
        //DO THE STUFF
        return retorno;
    }

    public ReturnFuncion2 Function2(string param1, string param2)
    {
        var retorno = new ReturnFuncion2();
        //DO THE STUFF
        return retorno;
    }
}

The concept (name) of the package class is a service?