Creating a Service for retrieving data related to a account.

Hi all,

I need to create a service which will return data related to an account entity in Ms Dynamics CRM. This service will have account GUID as input parameter which will be passed by the service consumer. 

I have a rough idea of how to do this i.e 

1. creating a Asp.net web service application (.asmx)  in Visual  Studio.

2. Adding a Service Reference of CRM organization service .

3. Using the Service Reference to access the classes and methods of CRM  and perform the required operations.

however i am not sure if this is the right way to do this, or there is a better way to achieve this.

Please guide as i can't move further as i am having real tough time performing the basic operations using service reference as compared to a basic plugin where it would have been a simple task to return info based on GUID.

Thanks in advance 

Regards 

Prem