Can you carry an umbrella inside?

Yes you can. They supply umbrella bags

Yes, I think they have umbrella bags.

My husband works at the Bay Center and he says yes you can, and they do offer umbrella bags.

Yes

I'm not sure if you're asking if you have the ability or if you need permission. At Big venues they do have security but I do not think they would prevent an umbrella from going inside.

Yes, it may be dependent upon the event or security

There's nothing stopping you

I don't think so