Deleting Audit history change records through c#

Mainly I had this requirement where I had to delete audit log to shrink the database size so that it come back within log capacity threshold. 

Below is the code for the DeleteRecordChangeHistoryRequest() method usage. 
Here I am looping through the records to delete the changed history for a particular entity in my case it is "Customer Asset".

static void Main(string[] args)

{

try

{

 IOrganizationService _service;

 ClientCredentials credentials = new ClientCredentials();

 credentials.UserName.UserName = "username";

 credentials.UserName.Password = "pwd";

Uri serviceUri = new Uri(@"soapurl");

OrganizationServiceProxy proxy = new OrganizationServiceProxy(serviceUri, null, credentials, null);

 proxy.EnableProxyTypes();

  _service = (IOrganizationService)proxy;

//fetchXML for getting entity

 string fetchXML = @"<fetch mapping='logical'>   

                                       <entity name='msdyn_customerasset'>                                              

                                            <attribute name='msdyn_name'/>

                                            <attribute name='msdyn_customerassetid'/>                                             

                                       </entity>  

                                    </fetch>  

                                      ";

 EntityCollection EntityList = _service.RetrieveMultiple(new FetchExpression(fetchXML));

 Console.WriteLine("COUNT RESULTS: {0}", EntityList.Entities.Count);

              

 foreach (var record in EntityList.Entities)

{

     var EntityLogReference = new EntityReference(record.LogicalName, record.Id);

                        

    Console.WriteLine("Entity Name: " + EntityLogReference.LogicalName);

    if (EntityLogReference.LogicalName != "contact" || EntityLogReference.LogicalName != "account")

     {

      var DeleteAudit = new DeleteRecordChangeHistoryRequest();

      //-- Set entity to delete - workaround as CRM does not allow to delete Audit directly

       DeleteAudit.Target = new EntityReference(record.LogicalName, record.Id);

      if (EntityLogReference.Id != Guid.Empty)

      {

        _service.Execute(DeleteAudit);

     Console.WriteLine("Delete Successful for Entity " + record.LogicalName + "Record " + record.Id);

        }

 }

else

{

               Console.WriteLine("Skipped delete...");

}

 }                  

 }

catch (Exception ex)

{

      Console.Write(ex);              

}