protected override object GetElementKey(ConfigurationElement element)
{
TokenProviderElement tokenProviderElement = (TokenProviderElement)element;
if (tokenProviderElement == null || string.IsNullOrEmpty(tokenProviderElement.Name))
{
throw new ConfigurationErrorsException(SRCore.NullOrEmptyConfigurationAttribute("name", "tokenProvider"));
}
return(tokenProviderElement.Name);
}