regex101: IsMethod

Non-Capturing Group(?:((\babstract\b\s)?)(T\s|\w+<?\w+<?\w+>?>?\s)(\w+<T>|[a-zA-Z0-9]+)(\(.*\))(\s=>\s\w+)?)

Group 1((\babstract\b\s)?)

Group 2(\babstract\b\s)?

?repeats the group contents below at most once:

\ban ASCII word boundary

abstractthe literal text abstract (case sensitive)

\ban ASCII word boundary

\sany whitespace character

Group 3(T\s|\w+<?\w+<?\w+>?>?\s)

1st AlternativeT\s

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

\sany whitespace character

2nd Alternative\w+<?\w+<?\w+>?>?\s

\w+any word character, repeated at least once

<?optionally matches the literal < (60₁₀ / 74₈ / 3C₁₆)

\w+any word character, repeated at least once

<?optionally matches the literal < (60₁₀ / 74₈ / 3C₁₆)

\w+any word character, repeated at least once

>?optionally matches the literal > (62₁₀ / 76₈ / 3E₁₆)

\sany whitespace character

Group 4(\w+<T>|[a-zA-Z0-9]+)

1st Alternative\w+<T>

\w+any word character, repeated at least once

<T>the literal text <T> (case sensitive)

2nd Alternative[a-zA-Z0-9]+

Character Class[a-zA-Z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 5(\(.*\))

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

.*any character (except for line terminators), repeated any number of times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group 6(\s=>\s\w+)?

?repeats the group contents below at most once:

\sany whitespace character

=>the literal text =>

\sany whitespace character

\w+any word character, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

(?:((\babstract\b\s)?)(T\s|\w+<?\w+<?\w+>?>?\s)(\w+<T>|[a-zA-Z0-9]+)(\(.*\))(\s=>\s\w+)?)

Test String
New

public void Something();
public List<int> SomethingElse();
private List<string> SomethingElseElse(One one);
private IEnumerable<List<string> Crazy(One one, Two two);
private IEnumerable<List<string> Crazy(One one, Two two) => AndSoOn;
public abstract void Run();
public T Get<T>(params object[] args)
private void rfrmBusyScreen_Load(object sender, EventArgs e)
public void Generate24HourSchedule(List<ScheduledEntry> scheduled)

Regular Expressions 101

Regular Expression

Test String
New

Extraction
Processing...

Regular Expression

Test StringNew

ExtractionProcessing...

Test String
New

Extraction
Processing...