Enmarcha.SharePoint.Entities.Artefacts.ListSharePoint.RemovePermissionsGroup C# (CSharp) Method

        public bool RemovePermissionsGroup(string group)
        {
            try
            {                
                var listAdd = Web.Lists[Name];
                var oGroup = Web.Site.RootWeb.Groups.GetByName(group);
                listAdd.RoleAssignments.RemoveById(oGroup.ID);
                listAdd.Update();             
                return true;
            }
            catch (Exception exception)
            {
                Logger.Error(string.Concat("Error AddPermission :", exception.Message));
                return false;
            }
        }
        /// <summary>