>Properties are client side but on the server the object is xml serialized. When you hit the web services a second time the object is deserialized and uses the properties to set the field values.

I was talking on the server only. I have a method which is calling an object method. That object is having a property. My assumption was that was initialized everytime thus the default property of a boolean would be false. But, if it turns true, on the next Web Service hit, it is still true.