Regex Match any string powershell
$a = [regex]"\[(.*)\]"$b = $a.Match("sdfqsfsf[fghfdghdfhg]dgsdfg") $b.Captures[0].value
Match everything that isn't a bracket. Create a character class that contains anything but the bracket characters:
$line -match "\[[^\[\]]+\]"
Focusing to
"I am just trying to pick up anything that could possibly be within two brackets [ ]"
I think \[.*\] is what you are looking for.
Explanation
Sice [ and ] have special purposes, so you need to use \ before those characters..(dot) stands for any character and* stands for any number of repetition of the previous charector.
Here, the previous character is ., so .* stands for any general string.