关于静态变量如何在ASP.NET中工作的简单问题？

I have a map which displays some info. By default, labels on the map are turned off. There is an image button which has a turned-off image associated with it when you the labels are off and a turned-on image associated with it when you turn the labels on. I have the code working, but I wanted a better reason as to why it works this way. Here is a snippet of code.I have a map which displays some info. By defau