Regular Expression: Section names with unknown length?

Question

I have a text block that is formatted like this:

1.2.3.4.5 or 1.2222.3.4.5 or 1 or 1.2 etc

An unknow number of numbers and dots (sections of a legal document)

How can I capture the full section (1.2.3.4.5) into a group?

I use C# but any regex is fine, aI can translate it.

Answer 1

UPDATED

Use this Regex:

Regex.Matches(inputString, @"\d[\.\d]*(?<!\.)");

explain:

\d                       digits (0-9)

[.\d]*                   any character of: '.', digits (0-9) 
                         (0 or more times, matching the most amount possible))

(?<! subexpression)      Zero-width negative lookbehind assertion.