Hi Deeban,
There are actually only six classes and one delegate definition in the assembly namespace. These are:

Capture: Contains the results of a single match

CaptureCollection: A sequence of Capture's

Group: The result of a single group capture, inherits from Capture

Match: The result of a single expression match, inherits from Group

MatchCollection: A sequence of Match's

MatchEvaluator: A delegate for use during replacement operations

Regex: An instance of a compiled regular expression

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Sathish Kumar.R
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