Search from Multiple filepath

Question

experts,

i would like to search files from multiple file path . how to achieve the same . current code is searching from one filepath only . need to search the same from  multiple file path.

 

current code which is not working ?

 

protected void gvEmployeeDetails_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Download")
        {
            Response.Clear();
            Response.ContentType = "application/octect-stream";
            Response.AppendHeader("content-disposition", "filename=" + e.CommandArgument);
            Response.TransmitFile(("S:/Acc/Odoc/EMENTS/GRADE/") + e.CommandArgument);
            Response.TransmitFile(("S:/Acc1/Odoc/EMENTS/GRADE/") + e.CommandArgument);
            Response.End();


        }