C# Regex Help? Using an integer to search through regex?

We have this text:

> <snippet>
> 	<content><![CDATA[
> ${1:first}, ${2:second} ${3:second}
> ]]></content>
> 	<!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
> <tabTrigger>2p</tabTrigger> 
> 	<!-- Optional: Set a scope to limit where the snippet will trigger -->
> 	<!-- <scope>source.python</scope> -->
> </snippet>

I want to grab this elements and add them to a list is my goal but only add them in the list if the number exist , the elements could be 4 or 5 or 10 it doesn’t matter…


we use this command of regex to grab them :

Regex myRegex = new Regex(@"`(\${)(.*?)(?=})`");

and somehow i want to use a counter like to search through , i want something like this ,but i know is not possible because it doesn’t work exactly like that…so any ideas how can i do that in c#? or in general ?

int num;

Regex myRegex = new Regex(@"(\${num)(.*?)(?=})");