[ASP.NET 3.5][C#] How to add field to delete Role ?

How to add field to delete Role ?

I want to add "Delete" field to Gridview. (Button ? HyperLink or ? )
Click will  delete special Role. How to do ?
Could anybody help me ?
Thank you very much .

using System;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Web.Security;  // Roles

public partial class roles_mgr : System.Web.UI.Page
{
    string[] rolesArray;
   
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.User.Identity.IsAuthenticated)
        {
            Response.Redirect("~/login.aspx");
        }
        if (!IsPostBack)
...