Naming local constants: UpperCamelCase or lowerCam

Question

Which naming convention do you use for local constants in C# and why?

const int Pi = 3;
const int pi = 3;

It seems the trade-off is between lower camel-case indicating restricted scope, and upper camel-case being more readable and easier to move to a class level. I've noticed StyleCop prefers upper camel-case.

Answer 1

We use lower-case (camel casing) because local constants are almost local variables except of course you cannot modify them. (And we use camel casing for local variables of course...)

Answer 2

I'm used to upper case (pascal case) for everything except variables and fields. Global constants are an exception to the fields, I don't know why, probably because they are public in some cases. Local constants are also lowercase so.

It's just a matter of taste imo. Of course, within a product / team, there should be an agreement.

On the other hand, our coding guideline requires full uppercase for constants, this would be PI in this case. I don't like this because upper cases are hard to read and need underlines for separation (which is against code analysis rules). Nobody follows this guideline anymore.