Using different wordpress theme depends on different site?

Question

I'm using multiple sites in wordpress, here's the situation.

I got a theme which I need to use it only for my main site and I don't want my sub-site to use or even see it. How can I do this?

Answer 1

I'm thinking you are using the Network feature of WP, right? Then this should do the work.

The Network Admin Themes Screen controls which themes are available to Site administrators in their Administration > Appearance > Themes Screen. Network Administrators must install the themes in the wp-content/themes folder for the themes to be available. Themes can also be selectively activated for individual Sites in the Theme Info section when Editing a site via Administration > Network Admin > Sites.

Taken directly from the documentation .