// Remove a client
public static void RemoveClient(EventClientEx client)
{
clients = MulticastDelegate.Remove(clients, client);
}
// Add a client
// A client will get both the message and a severity
// level. The client is responsible for calling the
// correct logging function based on the severity.
public static void AddClient(EventClientEx client)
{
clients = MulticastDelegate.Combine(clients, client);
}