get sentences in paragraphs REGEX

[faelnefal]

i need to regex to get all the sentences within a paragraph... how will i do that?
tnx in advance

[BrianHjoellund]

Depends on how the paragraphs are seperated. Is it HTML paragraphs (<p>), RTF (\par), or carriage return/line feed or something completly different?

[cloud255]

Well sentences are separated by a punctuation mark such as .!? and then have 2 white spaces after that. You can create a regex to look for one of those punctuation marks which is followed by 2 white spaces, but there is no guarantee that your users are using proper punctuation in their paragraphs...

[faelnefal]

how about words in paragraphs?

here is a sentence. this sentence shouldnt be here.
here is another sentence. this sentence must not also be present.
here is the next sentence.

i need the words between the sentences that has the words "here" and "sentence"

the result would be:
here is a sentence
here is another sentence
here is the next sentence

[cloud255]

@faelnefal
What about the " this sentence shouldnt be here." ?
It contains both the words "sentence" and "here".

What is suggest is that you search for the index of each ". " combination.
Create a substring up to that point, then use the string.Contains() function to see if it contains your keywords. If the order of the words matters then you have to compare the starting indexes of the key words to ensure that they are in the correct order.