10. What we used Nunit (http://nunit.org) ReSharper(http://jetbrains.org) TestDriven.Net (http://www.testdriven.net)
11. Work Create a CurrencyConventorclass that knows how to exchange a currency into another currency using an exchange rate.(for example EUR to RON at exchange rate 4.3) Only two tests: When exchange rate is 1.5 and the sum that is going to be changed is 100 When exchange rate is 2 and sum is 300