combofill error

Question

Error   : 1    Method must have a return type 



public cmbsfill()
        {
            classsp spclass=new classsp();
            ddlsclass.DataSource=spclass.ClassViewall();
            ddlsclass.DataValueField="classId";
            ddlsclass.DataTextField="className";
            ddlsclass.DataBind();
            ddlsclass.Items.Insert(0,"--Select--");
        }