Can any 1 help me how to do data driven test using selenium

Question

Dear Sir/Madam

I have written this code for selenium c sharp web driver.i want to bind csv file to extract value from the csv file but i am getting error like this

Test method SeleniumTest_1.Automationusing_selenium.TestCurrencyConvertorDDT threw exception: 

OpenQA.Selenium.Support.UI.UnexpectedTagNameException: Element should have been select but was input

and line where i am getting error is 

var selectinto = new SelectElement(setValueInto);

This is my full code

var convertVal = TestContext.DataRow["FirstCountryByText"].ToString();

            var intoval = TestContext.DataRow["SecondCountryByText"].ToString();

            var input = TestContext.DataRow["Input"].ToString();

            var expectedValue = TestContext.DataRow["ExpectedValue"].ToString();

            driver.Navigate().GoToUrl("http://www.oanda.com/currency/converter/");

            //driver.FindElement(By.Id("quote_amount_input")).Clear();

           //driver.FindElement(By.Id("quote_amount_input")).SendKeys("1");

           var setValueConvert = driver.FindElement(By.Id("quote_currency_input"));

           var setValueInto = driver.FindElement(By.Id("base_currency_input"));

           var inputt = driver.FindElement(By.Id("quote_amount_input"));

           var transfervalue = driver.FindElement(By.Id("base_amount_input"));

           var selectConvertItem = new SelectElement(setValueConvert);

           var selectinto = new SelectElement(setValueInto);

           var inputte = new SelectElement(inputt);

            var convertval=new SelectElement(transfervalue);

            selectConvertItem.SelectByText(convertVal);

            selectConvertItem.SelectByText(intoval);

            selectConvertItem.SelectByValue(input);

            var currencyValue = transfervalue.GetAttribute("value");

            Thread.Sleep(900);

            Assert.AreEqual(expectedValue, currencyValue);