NServiceBus.NamespaceRouteSource.GenerateRoutes C# (CSharp) Method

        public IEnumerable<RouteTableEntry> GenerateRoutes(Conventions conventions)
        {
            var routes = messageAssembly.GetTypes()
                .Where(t => conventions.IsMessageType(t) && string.Equals(t.Namespace, messageNamespace, StringComparison.OrdinalIgnoreCase))
                .Select(t => new RouteTableEntry(t, route))
                .ToArray();
            if (!routes.Any())
            {
                throw new Exception($"Cannot configure routing for namespace {messageNamespace} because it contains no types considered as messages. Message types have to either implement NServiceBus.IMessage interface or match a defined message convention.");
            }
            return routes;
        }