When using EzParts/EzData/EzPartsWeb with SQL2017 and newer for first time, you can get following exception:
Starting from SQL2017 CLR assemblies should be added to trusted list.
1) Run SQL Management Studio, r-click on EzParts DB, 'New query...';
2) Paste attached query (untrusted_assy.sql), modify it to contain correct assembly id (see screen shot w/ highlighted info above);
3) Execute query by clicking 'Run' button, or hitting 'F5' on keyboard.