c# how do I get StreamReader to read a string instead of Stream?

Question

I am trying to get streamreader to read a csvfile as a string. I keep getting the argument 1 cannot convert from 'string' to System.IO.Stream. The StreamReader is initializing StreamReader(stream stream) instead of StreamReader(string). Any help would be greatly appreciated.

 public class CsvParser
{

    public static void LoadAndParse()
    {
        string csvData = @"text.csv";
        var fileContents = Parse(csvData);

    }

    public static List<StockInfo> Parse(string csvData)

    {


        var stocks = new List<StockInfo>();
        using (StreamReader reader = new StreamReader(csvData))

        {
            string line = "";
            while ((line = reader.ReadLine()) != null)

            {
                string[] cols = line.Split(',');
                StockInfo s = new StockInfo();
                s.Date = Convert.ToDateTime(cols[0].Trim());
                s.Open = Convert.ToDecimal((cols[1]));
                s.High = Convert.ToDecimal((cols[2]));
                s.Close = Convert.ToDecimal((cols[3]));

                stocks.Add(s);


            }


            return stocks;

        }
    }

}