How can I remove everything between two lines in a file?

[Anonymous Monk]

I have two lines, lets say "-line1-" and "-line2-" and between these lines I have some lines. The amount and the content of these lines are unknown. Like this:

some lines
-line1-
lineA: xxx
lineB: y
lineC: zz
-line2-
more lines

So, I want to remove everything between "-line1-" and "-line2-", in this case lines A, B and C. How can I do this?

Originally posted as a Categorized Question.

[merlyn]

See perlfaq "How can I pull out lines between two patterns that are themselves on different lines?".