Recursive RegEx in .NET? (?R)

Question

When I use (?R) in a RegEx pattern in .NET, I get an ArgumentException:

Unrecognized grouping construct.

Does (?R) this have a d

Answer 1

.NET doesn't support RegEX recursion but you can check this project to use PCRE in .NET
I hope it will be implemented in System.Text.RegularExpressions asap