var x = _context.Database.SqlQuery<Company>("SELECT * FROM Companies").ToList();

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Objects;
using System.Linq;
using System.Linq.Expressions;
using BusinessDomain.Entities;
using Microsoft.VisualStudio.TestTools.UnitTesting;