In my development environment, I have the following taxonomy:
const string eventsTaxonomyPath = "\\Upcoming Events";
const long eventsTaxonomyId = 89;
It sounds like you already found this method (or something like it) in what I like to call the "Legacy API":
var taxonomyApi = new Ektron.Cms.API.Content.Taxonomy();
var taxonomyId = taxonomyApi.GetTaxonomyIdByPath(eventsTaxonomyPath);
Without any info on what version you're on, I'll assume it's a recent (8.5+) version. The Framework API makes it really easy to get the content from a given taxonomy. Below are a couple of ways that work on v9.0 and will most likely work in anything 8.5+ -- in the [developer briefing webcast]() the only major change for the Framework API in v9 was the inclusion of the e-commerce namespace.
Getting the full taxonomy tree via the `TaxonomyManager`:
var taxonomyItemManager = new Ektron.Cms.Framework.Organization.TaxonomyManager();
var taxData = taxonomyItemManager.GetTree(eventsTaxonomyId, includeItems: true);
Getting all the content recursively from a given taxonomy folder via the `ContentManager`:
var contentManager = new Ektron.Cms.Framework.Content.ContentManager();
var criteria = new ContentTaxonomyCriteria();
criteria.AddFilter(eventsTaxonomyPath, true);
criteria.ReturnMetadata = true;
var content = contentManager.GetList(criteria);
The potential downside to the `ContentManager` way is that you lose the hierarchical taxonomy structure. The upside to using the `ContentManager` is that you can tell it to include all the metadata for each content block. That's not possible with the `TaxonomyManager` or `TaxonomyItemManager`.