Regular Expressions 101

Group 1((?!|$|\").*?)

Negative Lookahead(?!|$|\")

1st Alternative — matches an empty string

2nd Alternative$

$end of string, or before its final line terminator

3rd Alternative\"

\"the literal " (34₁₀ / 42₈ / 22₁₆)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

((?!|$|\").*?)

New

@@doc.Register.Vertragsende@@!=null ? new DateTime({@@doc.Register.Vertragsende@@,@@doc.Register.WiedereinstellungszusageBis@@}.nonNull().max().Year, 12, 31) : null