In c# what the hell is the difference between const and readonly? I looked this up today and:
Here’s what I found.
- Are slightly less expensive to evealuate
- Are static by default
- Can be declared inside functions
- Have gotta have compile time value
- Are set at compile time inside assemblies that use them
Readonly (readonly) instance fields:
- Must have set value by the time constructor exits
- Are evaluated when instance is created
So I tend to use readonly fields if I ever think the constant will be referenced outside of my assembly. Otherwise I’ll take the microsecond and use a const.