c# -find roman numerals and convert to int

Will the numerals always be at either the beginning or end of the string?
Will "VARA CIVIL" always be in the string?

not really.. that was just a sample..

the roman numerals could be anywhere in the string (most of the time they are at either the beggining or at the end, but i cant be sure if that would be always the case)

but the text it will be different everytime.

is it possible to do such thing ?

Since the roman numeral will always be a word, first break the string into it's component words.

         string y = "VARA CIVIL XX";
         string[] x = y.Split(' ');

this makes anarray of strings
     x[0] = "VERA"
     x[1] = "CIVIL"
     x[2] = "XX"

then try each value in the string array x to see if it is a valid roman numeral.

Here is a link to an example of how to convert a roman numeral to a number.
http://www.blackwasp.co.uk/RomanToNumber.aspx

You could do a regex match with pattern:
(?i)\b(?=[ivxlcdm]+)M{0,4}(?:CM|CD|D?C{0,3})(?:XC|XL|L?X{0,3})(?:IX|IV|V?I{0,3})\b

Based on, but slightly modified from, a pattern from: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression

That would capture only valid roman numerals, I believe - then you'd have to convert them to an integer.