[Gibbon1]

I would say two months straight of serious study and practice would be more than enough to solidly know your way around the language, .net libraries and tools.

Buy a good book.

I don't actually do client side (or server side stuff) as primary work. However .net is very useful for kicking out simple GUI based tools. If you want to do that, .net has the fastest learning curve end of story.

[gamechangr]

Thanks "Gibbon1" for avoiding the usual "10,000 hours" response. Upvoted!

I know it's hard to quantify. I have a friend who has offered to do a "8 week internal training program with me" if I commit to working with his company for one year.

I just wanted to hear someone objectively tell me that they thought that's doable first.