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Singleton and Interface

Posted By:      Posted Date: August 30, 2010    Points: 0   Category :ASP.Net
I want to implement the interface singleton, same like generic singleton.   public class Singleton<T>  { } Singleton<OnlineUser>..   So how to implement Singleton<IOnlineUser> ?    

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I know what Singleton Pattern means and Abstract class means.

What I wanted to know was how would this apply to real world.

Could anyone give me any good example or simple explanation.

Say I have a simple website, why would I use any of the above if any.

Why would it simplify my architechture.

Thanks in advace. 

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I am using a wcf service that I created, when both hosting machine and the client machine are on the same domain everything works just fine. When I publish the client app to the webserver in the DMZ I am getting the following error:

SOAP security negotiation with '' for   
'' failed. See inner exception  
for more details.The Security Support Provider Interface (SSPI) negotiation failed.

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I have a class that is created as a singleton because its used to access the filesystem in a multi-threaded app.

As part of the class instantiation I need to assign some values to an internal list used by the class when I set an instance of it.

Heres some bare bones code for what im trying to do

The singleton class
sealed public class Validator : IValidator

	set up some private variable here...
	List<blah> lst = new List<blah>();  basically 1 or more  pairs of strings

	public static Validator Instance

		code here to add items to the List (lst)?
		SchemaSet = new XmlSchemaSet();
		for each (blah b in lst)
			SchemaSet.Add(b.value1, b.value2);	
		more code here.......

and the code to use an instance of my class

private Validator SValidator;
SValidator = Validator.Instance;  -- add items to the List here?

so when I create an instance of Validator, how can I assign values to the list when its being created, something like

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