MS Dynamics CRM - Bulk Delete using XRM

Import

MSDynamicsCRM2011.DNS.Entities
microsoft.crm.sdk.proxy
microsoft.xrm.client
microsoft.xrm.sdk
System.ServiceModel
System.Data.DataSetExtensions

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Crm.Sdk.Messages;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Client;
using Microsoft.Xrm.Sdk.Query;
using GCEntity = BT.CRM2011.DNS.Entities;
using System.ServiceModel.Description;

namespace CRM.Audit.BulkDelete
{
    class Audit
    {
        private BulkDeleteResponse _bdRes;
        private Guid _bdResID;
        private Guid _bdGUID;
        private ConditionExpression _conExp;

//Delete Method

        public void Delete()
        {
            SystemJob(GCEntity.dns_audit.EntityLogicalName, "Audit Bulk Delete - Code", _conExp);
            Console.WriteLine("Audit Deleted");
            SystemJob(GCEntity.Contact.EntityLogicalName, "Contact Bulk Delete - Code", _conExp);
            Console.WriteLine("Contact Deleted");
            Console.ReadLine();
        }