Is there a way to intercept setters and getters in C#?

Not generally; a few options though;

• inherit from ContextBoundObject – which does allow this, but at a performance cost
• write an explicit property (i.e. with a backing field), and add a utility method call manually
• look at compile-time weavers, such as PostSharp – generally by spotting an attribute or similar
• look at runtime code generators, as offered by some DI/IoC tools (and some other “decorator” based tools) – which either decorate or subclass your object to add the extra code