thanks for any help.
const string USERNAME = "MYUSER"; //Usuario
const string PASSWORD = "MYPASSWORD"; //Senha
string profileId = ga;
AnalyticsService service = new AnalyticsService("AnalyticsSampleApp");
service.setUserCredentials(USERNAME, PASSWORD);
DataQuery query = new DataQuery(dataFeedUrl);
DataQuery query2 = new DataQuery(dataFeedUrl);
int mesAtual = DateTime.Today.Month;
int anoAtual = DateTime.Now.Year;
int mesAnterior = (mesAtual - 1);
int diasMes = DateTime.DaysInMonth(2012, mesAnterior);
query.Ids = profileId;
query.Metrics = "ga:visits,ga:visitors,ga:pageviews"; //pegar métricas
query.Dimensions = "ga:date";
query.Sort = "ga:date"; //Ordenar
query.GAStartDate = DateTime.Now.AddDays(-7).ToString(2012+"-0"+mesAnterior +"-01");
query.GAEndDate = DateTime.Now.ToString(2012 + "-0" + mesAnterior + "-" + diasMes);