Backtracking Regular Expressions in .Net

is it possible to form with the .net Regex class backtracking expressions?

is it for example possible, creating a regex which forms braces like in ari开发者_开发问答thmetic formulars? like it would accept ( ), ( ( ) ((()())), but not ((, (()(), ()))?

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Yes, it is possible, but it's not called backtracking.

You're looking for Balancing Group Definitions.

Backtracking is completely different.