Checking delegates for null

Question

I was reading the Essential C# 3.0 book and am wondering if this is a good way to check delegates for null?:

class Thermostat
{
    public delegate void Temperat         


        

Answer 1

There is a reason the code you've given is recommended over C. Ross's version. However, John is also right that there is still another problem if an event is unregistered in the meanwhile. The blog I linked recommends that the handler ensure they can be called even after being unregistered.