Regular Expression question

[Natalia DeBow]

Hi there,

I am stuck here on another problem, trying to come up with a regular
expression for the following case:
a. if a substring "/*" is detected, there is no "*/" that would follow it;
b. if a substring "/*" is detected, there is neither "//" nor "/" that
precedes it.

Part a is working fine, but when I add part b to it, things become broken
once again.

I have tried a few reg. ex.'s but nothing seems to work.

Here is what I have tried so far:
@"\s*(?!//?.*)(/[*])(?!.*[*]/)(?<comment>.*)"
@"\s*(?!.*//?)(/[*])(?!.*[*]/)(?<comment>.*)"
@"\s*(?<!//?.*)(?<=/[*])(?!.*[*]/)(?<comment>.*)"

Basically what I am trying to detect is a block comment, that is something
of this format:
/* some comment
some more comments
and a few more
*/
However, I need a way to differentiate the case, where I have the following:
//* some comment
// some other comment
///*****************

In this case, if // or / precede an /*, then I have a single-line comment
and not a block comment.

Any help would be greatly appreciated!

Thanks,
Natalia