Carrotware.CMS.Core.ExtendedUserData.RemoveFromRole C# (CSharp) Method

        public bool RemoveFromRole(string roleName)
        {
            return SecurityData.RemoveUserFromRole(this.UserName, roleName);
        }

        protected void btnApply_Click(object sender, EventArgs e)
        {
            if (userID != Guid.Empty) {

                MembershipUser usr = Membership.GetUser(userID);
                usr.Email = Email.Text;
                Membership.UpdateUser(usr);

                ExtendedUserData exUsr = new ExtendedUserData(userID);
                exUsr.UserNickName = txtNickName.Text;
                exUsr.FirstName = txtFirstName.Text;
                exUsr.LastName = txtLastName.Text;
                exUsr.UserBio = reBody.Text;

                exUsr.Save();

                if (!chkLocked.Checked) {
                    usr.UnlockUser();
                    Membership.UpdateUser(usr);
                } else {
                    if (!usr.IsLockedOut) {
                        int iCount = 0;
                        while (iCount < 10) {
                            Membership.ValidateUser(usr.UserName, "zzBadPassWord123a" + iCount.ToString());
                            Membership.ValidateUser(usr.UserName, "zzBadPassWord123b" + iCount.ToString());
                            iCount++;
                        }
                    }
                }

                exUsr.AddToRole(SecurityData.CMSGroup_Users);

                CheckBox chkSelected = null;
                HiddenField hdnSiteID = null;

                foreach (GridViewRow dgItem in gvSites.Rows) {
                    hdnSiteID = (HiddenField)dgItem.FindControl("hdnSiteID");

                    if (hdnSiteID != null) {
                        Guid guidSiteID = new Guid(hdnSiteID.Value);
                        chkSelected = (CheckBox)dgItem.FindControl("chkSelected");

                        if (chkSelected.Checked) {
                            exUsr.AddToSite(guidSiteID);
                        } else {
                            exUsr.RemoveFromSite(guidSiteID);
                        }
                    }
                }

                HiddenField hdnRoleId = null;

                foreach (GridViewRow dgItem in gvRoles.Rows) {
                    hdnRoleId = (HiddenField)dgItem.FindControl("hdnRoleId");
                    if (hdnRoleId != null) {
                        chkSelected = (CheckBox)dgItem.FindControl("chkSelected");

                        if (chkSelected.Checked) {
                            exUsr.AddToRole(hdnRoleId.Value);
                        } else {
                            exUsr.RemoveFromRole(hdnRoleId.Value);
                        }
                    }
                }
            }
        }