Can anyone see why StringWritter is not being recognised?
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Been a while since iv'e programmed in c sharp, so a bit rusty.

ive go this line  

    StringWritter stringWritter = new StringWritter();

and the following declared at the top of the class

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.IO;
    using System.Text;

I can understand why its underlining StringWriter saying "The type or namespace could not be found?