Regex group name

input: -155'-10 5/16"

Regex pattern

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(-?\d+)'(?:-(\d+)(?:\s(\d+)\/(\d+))?")?

Match match = Regex.Match(input, pattern);

match.Groups[0].Value

Regex pattern with group name (synctax ?<groupName>)

--------------------------

(?<feet>-?\d+)'(?:-(?<inches>\d+)(?:\s(?<fraction>\d+)\/(?<denominator>\d+))?")?

Match match = Regex.Match(input, pattern);

match.Groups["feet"].Value