NTCredentials credentials = new NTCredentials(username, password, null, domain);
HttpClient httpClient = //preparing HttpClient and providing created credentials to it;
HttpGet getMethod = //preparing GET method with setting appropriate Accept header and builded URL;,

http://mysharepointserver/_vti_bin/ListData.svc/SomeService?$select=Name,Modified,ContentType,Path&$filter=((Path%20eq%20'/SomePath'))