VS 2013 Software Development Platform.

Hello everyone,

For last several years I am working on vb.net and SQL Server. I am designing a time tracking software to distribute to my all clients. My issue is some of my clients are using Linux and Mac OS.
If I design my software in vb.net how can I run it on Linux and Mac OS, is there any possibility to run software on these platforms?

Please advice.

Thank you
Ladak