Need some clarification about singleton pattern

Question

Does singleton design pattern make sure one single object reference or there is any chance/possibility of more then one ref of an object while implementing singleton pattern, I think in the case of multi threading there is a some chance of more then one object even we have implemented singleton pattern.

Please help.

Answer 1

It is possible for threading to cause problems with a singleton. You can find a comprehensive set of solutions for making singletons thread safe here:

http://csharpindepth.com/Articles/General/Singleton.aspx