Hello Mathew, I have developed a patch [1] for HexBox control 1.6.0 that disables usage of carets when required unmanaged functions are not available in the runtime platform.With this patch caret is not displayed on Linux with Mono runtime but other than that HexBox control is still perfectly usable. Feel free to incorporate these changes into your package or contact me if you need any help with that.
[1] https://github.com/jariq/Be.HexEditor/commit/c05c5df1358bf5427dd2fcec0e392a132cd69422 Regards, Jaroslav