https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2013/07/12/howto-remove-invalid-filename-characters-in-net.aspxIn ClipFlair Studio I use DotNetZip (Ionic.Zip) library for storing components (like the activity and its nested child components) to ZIP archives (.clipflair or .clipflair.zip files). Inside the ZIP archive its child components have their own .clipflair.zipelCommunityServer 2.1 SP3 (Build: 20423.1)