Question

I have a string as below:

4s: and in this <em>new</em>, 5s: <em>year</em> everybody try to make our planet clean and polution free. 

Replace string:

4s: and in this <em>new</em>, <em>year</em> everybody try to make our planet clean and polution free. 

what i want is ,if string have two <em> tags , and if gap between these two <em> tags is of just one word and also , format of that word will be of ns: (n is any numeric value 0 to 4 char. long). then i want to remove ns: from that string. while keeping punctuation marks(‘?’, ‘.’ , ‘,’,) between two <em> as it is.

also i like to add note that. input string may or may not have punctuation marks between these two <em> tags.

My regular expression as below

Regex.Replace(txtHighlight, @"</em>.(\s*)(\d*)s:(\s*).<em", "</em> <em");

Hope it is clear to my requirement.
How can I do this using regular expressions?

Answer 1

Not really sure what you need, but how about:

Regex.Replace(txtHighlight, @"</em>(.)\s*\d+s:\s*(.)<em", "</em>$1$2<em");