C#

public void GetAccount(int customerId, int accountId, Action<Entities.Account< onComplete>, Action<Exception> onError)
{
ServicesClient client = new ServicesClient();
client.GetAccountCompleted +=
    (sender, response) =>
    {
      if(response.Error == null)
      {
         Entities.Account account = Mapper.Map<Account, Entities.Account>(resposne.Result.Account);
         account.AccountState = Mapper.Map<AccountStatus, Entities.AccountState>(resposne.Result.AccountStatus);
         account.AccountType = Mapper.Map<AccountType, Entities.AccountType>(resposne.Result.AccountType);
         account.Location = Mapper.Map<Location, Entities.Location>(resposne.Result.Location);
         account.Location.Address = Mapper.Map<Address, Entities.Address>(resposne.Result.Address);

         this.GetAccountStateInfo(account,onComplete, onError); //exact same paradigm. Builds a request and calls GetAccountStateInfoAsync
                                                                //(request);
      }
      else
      {
        onError.Invoke(response.Error);
      }
    };
   client.GetAccountAsync(
     new GetAccountRequest()
     {
       AccountId = accountId,
       CustomerId = customerId,
       SessionId = this.Logger.SessionId
     });
}