Question

What is the difference between a Group and a Match in .NET’s RegEx?

Answer 1

A Match is an object that indicates a particular regular expression matched (a portion of) the target text. A Group indicates a portion of a match, if the original regular expression contained group markers (basically a pattern in parentheses). For example, with the following code:

string text = 'One car red car blue car'; string pat = @'(\w+)\s+(car)'; Match m = r.Match(text); 

m would be match object that contains two groups – group 1, from (\w+), and that captured ‘One’, and group 2 (from (car)) that matched, well, ‘car’.