请看下小弟我的这几句代码错哪了啊多谢~5分

请看下我的这几句代码哪里错了啊？谢谢~5分
namespace   index
{
public   class   index
{
private   void   Page_Load(Object   sender,   EventArgs   e)  
  {
  public   iframefordiscovery;
iframefordiscovery.Attributes.Add( "src ", "indexfordiscovery.aspx ");
  }
  }
}

这是.cs文件~

[解决办法]
namespace index
{
public class index
{
public iframefordiscovery;
private void Page_Load(Object sender, EventArgs e)
{

iframefordiscovery.Attributes.Add( "src ", "indexfordiscovery.aspx ");
}
}
}