CS1502: The best overloaded method match for System.Data.DataView.DataView(System.Data.DataTable) has some invalid arguments

Hello Sir,

Below is my code

 protected void gridContact_Sorting(object sender, GridViewSortEventArgs e)
    {

        string sortingDirection = string.Empty;
        if (dir == SortDirection.Ascending)
        {
            dir = SortDirection.Descending;
            sortingDirection = "Desc";
        }
        else
        {
            dir = SortDirection.Ascending;
            sortingDirection = "Asc";
        }
        string id = Session["id"].ToString();
        if (Convert.ToInt32(id) < 9999)
        {
            DataView sortedView = new DataView(BindContactsFree());
            sortedView.Sort = e.SortExpression + " " + sortingDirection;
            gridCompany.DataSource = sortedView;
            gridCompany.DataBind();
        }
        else
        {
            DataView sortedView = new DataView(BindContacts());
            sortedView.Sort = e.SortExpression + " " + sortingDirection;
            gridCompany.DataSource = sortedView;
            gridCompany.DataBind();
        }

    }

    public SortDirection dir
    {
        get
        {
            if (ViewState["dirState"] == null)
            {
                ViewState["dirState"] = SortDirection.Ascending;
            }
            return (SortDirection)ViewState["dirState"];
        }
        set
        {
            ViewState["dirState"] = value;
        }
    }

i am getting error is 

CS1502: The best overloaded method match for 'System.Data.DataView.DataView(System.Data.DataTable)' has some invalid arguments

at line

DataView sortedView = new DataView(BindContactsFree());

Please help me sir