CA1802 - Use Literals Where Appropriate
This one is so simple, it's pointless to even mention. All it means is that static readonly fields should be const. Heck, there's not even a need for regex; but, since I'm so cool, I'm going to add a little regex to it. Actually, the regex is kind of necessary to ensure all cases are covered correctly, seeing as tho spacing can be accomplished however the developer sees fit.
| Find: |
<static>:Wh+<readonly> |
| Replace: |
const |