lambda从指定集合中去除指定数据 asp.net

IList<UserRoleData> list = UserRoleBll.GetAll();
var data = from p in list where p.UserRoleName != "超级管理员" select p;
ddlUserRole.DataTextField = "UserRoleName";
ddlUserRole.DataValueField = "UserRoleId";
ddlUserRole.DataSource = data;
ddlUserRole.DataBind();