[RESOLVED] strange error

[dntel123]

i swear soemtimes code is right but visual studio is just being silly, i've had times where the code is perfect but theres an error which is solved if u make a new project and paste in the same code:

public partial class MainPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
        {
            string username Request.QueryStringQueryString["name"];

        WelcomeLabel.Text += ", " + username;
        }
    }
}

This bit of code has an error saying its expecting a semi-colon, anyone see the problem?