how to create CSV

hi

im using code  error show in line (stringbuilder sb = new stringbuilder(); ) can u plz give me stringbuilder class

            response.clear();

            response.buffer =

true;

            response.addheader(

"content-disposition",

            

"attachment;filename=gridviewexport.csv");

            response.charset =

"";

            response.contenttype =

"application/text";

            dgporesult.allowpaging =

false;

            dgporesult.databind();

            stringbuilder sb =

new stringbuilder();

          

           

for (int k = 0; k < dgporesult.columns.count; k++)

            {

               

//add separator

                sb.append(dgporesult.columns[k].headertext +

',');

            }

           

//append new line

            sb.append(

"\r\n");

           

for (int = 0; < dgporesult.rows.count; i++)

            {

               

for (int k = 0; k < dgporesult.columns.count; k++)

                {

                   

//add separator

                    sb.append(dgporesult.rows[i].cells[k].text +

',');

                }

               

//append new line

                sb.append(

"\r\n");

            }

            response.output.write(sb.tostring());

            response.flush();

            response.end();

in case aren't still aware, @ wrong place it's visual basic forum.

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onion recent refuge mac os x , hates mac app store. system: windows 7 x64

Visual Studio Languages  ,  .NET Framework  >  Visual C#