c# - Find/parse server-side <?abc?>-like tags in html document -

i guess need regex help. want find tags <?abc?> can replace whatever results code ran inside. need regexing tag/code string, not parsing code inside :p.

<b><?abc print 'test' ?></b> result in <b>test</b>

edit: not in general, matching (<?[chars] (code group) ?>)

this build new copy of string source, replacing <?abc code?> result of process(code)

regex abctagregex = new regex(@"\<\?abc(?<code>.*?)\?>");  stringbuilder newsource = new stringbuilder(); int curpos = 0;  foreach (match abctagmatch in abctagregex.matches(source)) {     string code = abctagmatch.groups["code"].value;     string result = process(code);      newsource.append(source.substring(curpos, abctagmatch.index));     newsource.append(result);     curpos = abctagmatch.index + abctagmatch.length; }  newsource.append(source.substring(curpos)); source = newsource.tostring(); 

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n.b. i've not been able test code, of functions may wrong name, or there may off-by-one errors.