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IObservable<StockQuote> GetQuotes(IScheduler scheduler, IEnumerable<StockQuote> quotes)
// TODO: Create an observable source of stock quotes
// HINT: Use both the scheduler and the quotes and think about how to create sources which are like events
IObservable<object> Query(IObservable<StockQuote> quotes)
// TODO: Write a query to grab the Microsoft "MSFT" stock quotes and output the closing price
// HINT: Make sure you include a property in the result which has a type of DateTime
var filteredQuotes = from quote in quotes
where quote.Symbol == "MSFT"