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how to count the unique number of operators?

hi all....

i want to know how to count the unique number of operators. i have used the following (c# code)....

StreamReader sr = new StreamReader(fname);
Regex operator_pat=new Regex(@"[\(\[\{\.\!\~\&\+\-\*\/\%\<\>\^\|\=\,\;]");
MatchCollection mc,mc1;
string code=sr.ReadToEnd();

mc=operator_pat.Matches(code);
tot_count=mc.Count;

this gives the total count of operators.. i want the unique occurence of each.. how to find it? please help...

thanks in advance...
Sep 20 '08 #1
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