The use of "trust you to...'

[Tom]

Hi

Could you please tell me how and when we use this expression? Is it ironical?

Trust you to...

[Mister Micawber]

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Like many phrases, it can be used ironically, Tom, but it is not intrinsically so. It is often used as an expression of gratitude.
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Native English teacher at Mister Micawber's

[Tom]

Many, many thanks, MM.

Could I request a few examples in both senses, i.e gratitude and ironical?

Tom

PS: By the way, is the red sentence correct and natural, in particular the use of the words 'gratitude' and 'ironical'?

[Mister Micawber]

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Irony exists in the context, Tom.

Trust you to remember my birthday!
Trust you to forget my birthday!
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Native English teacher at Mister Micawber's