C# dollar problem with regex-replace

Question

I want to insert a dollar sign at a specific position between two named capturing groups. The problem is that this means two immediately following dollar-signs in the replac

Answer 1

Use this replacement pattern: "${start}$$${end}"

The double $$ escapes the $ so that it is treated as a literal character. The third $ is really part of the named group ${end}. You can read about this on the MSDN Substitutions page.

I would stick with the above approach. Alternately you can use the Replace overload that accepts a MatchEvaluator and concatenate what you need, similar to the following:

jackHas = dollarInsertion.Replace(jackHas,
              m => m.Groups["start"].Value + "$" + m.Groups["end"].Value);