Could not find a part of the path 'C:\
===

Im getting this error. Even though i already created a folder "CMSExportedData"
Could not find a part of the path 'C:\CMSExportedData\Sales-20\07\2012.txt'.

Kindly help please

            System.IO.FileStream fs = new System.IO.FileStream("C:\\CMSExportedData\\Sales-" + DateTime.Now.ToString("dd/MM/yyyy") + ".txt", System.IO.FileMode.Create);
            System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, System.Text.Encoding.Default);