.NET Regular Expression Regex Query

[Snowflake]

Hi there, I need some assistance with a regex pattern.

What I am trying to do is filter files based on a regex expression

What the expression needs to do is find files that do not start with [f-z]\d{5} but do end in \.(dat|set)

I did try [^[f-z]\d{5}]\.(dat|set) but unfortunately it did not work.

Thanks for any help

 

[Snowflake]

I found the answer I needed, if it helps anyone you would need to use negative look behind in regex