LINQ in ASP .Net

LINQ quries :

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        Dataset dataContext = 
            new Dataset();

       //bind tables or data source in dataset

        var query = from contact in dataContext.tablename
          where tablename.columnname==1
          select contact;

        GridView1.DataSource = query;
        GridView1.DataBind();
    }
}

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