Dependencias:

Instalar el siguiente paquete utilizando la consola de Paquetes Nuget

Install-Package Unity -Version 4.0.1

PerRequestLifetimeManager.cs

IObjectContext.cs

namespace Infrastructure.Contracts
{
    using System;

    /// <summary>
    /// Interfaz que encapsula firmas de métodos del contexto.
    /// </summary>
    public interface IObjectContext:IDisposable
    {
        /// <summary>
        /// Método para guardar cambios en el contexto.
        /// </summary>
        void SaveChanges();

        /// <summary>
        /// Método para revertir una transacción.
        /// </summary>
        void RollBack();
    }
}

 IObjectSetFactory.cs

SELECT
	OBJECT_NAME(C.OBJECT_ID) AS 'Tabla'
	,C.name AS 'Columna'
	,SCHEMA_NAME(T.schema_id) AS 'Esquema'
	,T.name AS 'Tipo'	
	,C.max_length AS 'Tamaño Maximo en Bytes'
	,C.precision AS 'Precisión'
	,C.scale AS 'Escala'
FROM 
	sys.columns AS C
JOIN 
	sys.types AS T 
ON 
	C.user_type_id = T.user_type_id
WHERE 
	OBJECT_NAME(C.OBJECT_ID)='Card' 
ORDER BY 
	C.OBJECT_ID;