'ashamed of doing' is correct and usable in written English.
You can use it to refer to a feeling of guilt or embarrassment about an action you performed. For example, "I was ashamed of doing something that hurt my friend."
Never be ashamed of doing right.
Was I ashamed of doing the right thing?
On his desk calendar, he has a George Eliot quote he often turns to for inspiration: "Keep true; never be ashamed of doing right".
He insisted the party was on the right economic course and quoted the words of the Victorian author George Eliot, who came from Nuneaton: "Never be ashamed of doing right.
But I beg to differ with him when he piously says this: "We are not ashamed of doing what it takes to get the best people to help our cause".
Pulling a fancy T-shirt down and exposing a nipple - he was totally ashamed of doing it but he understood that was part of it all: the mission, the purpose, the job.
Getting old, for example, is not something to be ashamed of – don't hide your wrinkles or laughter lines – these are the creases you get as you skin ages or even you get from smiling too much!
Emphasize that it is okay to talk about their interest, and they don't need to feel ashamed or afraid of doing so.
What has happened to our values when we feel ashamed of not doing the wrong thing?
There was a gap while I was at university, where I learned to be ashamed of not doing it well enough, which is both a curse and a blessing, I suppose.
Those institutions should be ashamed of not doing a better job of outreach, particularly when it comes to explaining the financial aid process.
