New Blog Post - Add new EC Symbol provider with custom symbol sets using Managed API's

Read this blog post to learn how to develop your own custom Symbols for use in EC Expressions to add real power and flexibility to Item Types. Create new custom business properties that are calculated as mathematical expressions of your own custom symbols.

https://communities.bentley.com/products/programming/microstation_programming/b/weblog/posts/working-with-ec-symbol-providers-using-managed-apis