Are Java and C# regular expressions compatible?

Question

Both languages claim to use Perl style regular expressions. If I have one language test a regular expression for validity, will it work in the other? Where do the regular ex

Answer 1

Java uses standard Perl type regex as well as POSIX regex. Looking at the C# documentation on regexs, it looks like that Java has all of C# regex syntax, but not the other way around.

Compare them yourself: Java: C#:

EDIT: Currently, no other regex flavor supports Microsoft's version of named capture.