public void UpdateSettingForRole(string settingName, string settingValue, string roleName)
{
NewVersion.Descendants(name: Namespaces.NsServiceManagement + "Role").FirstOrDefault(
a => (string) a.Attribute("name") == roleName)
.Descendants(Namespaces.NsServiceManagement + "Setting").FirstOrDefault(
b => (string) b.Attribute("name") == settingName)
.SetAttributeValue("value", settingValue);
}