Trying to fill a dataset on page load in c#

I'm am new to c# and I'm still having the following problem after a lot of searching:
I'm trying to fill a dataset on page load and my code looks like this:

DataSet5TableAdapters.WebAccountTableAdapter WebAccountTableAdapter1;
        WebAccountTableAdapter1 = new DataSet5TableAdapters.WebAccountTableAdapter();
        WebAccountTableAdapter1.FillByUser(DataSet5.WebAccount, Profile.UserName);

(full code is attached below"

I'm getting the following error:  
Error      1      An object reference is required for the non-static field, method, or property 'DataSet5.WebAccount.get'

I can't see what I'm missing.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using CrystalDecisions.CrystalReports;
using CrystalDecisions.ReportSource;
using CrystalDecisions.Shared;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataSet5TableAdapters.WebAccountTableAdapter WebAccountTableAdapter1;
        WebAccountTableAdapter1 = new DataSet5TableAdapters.WebAccountTableAdapter();
        WebAccountTableAdapter1.FillByUser(DataSet5.WebAccount, Profile.UserName);
      
    }

}

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