Singleton class, use another class?

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Hi,

I have created a Singleton class to provide some database functionality in
my mobile application. I have a public class called Utility which performs
various operations on data. Is it ok to use the utility class in my Singleton
class? Here is some code to hopefully make it clearer what i want to do -

namespace MyApp
{
class SingletonConnec tion
{
private volatile static SingletonConnec tion instance;

private Utility utility;

private SingletonConnec tion()
{
}

public static SingletonConnec tion GetInstance()
{
if (instance == null)
{
instance = new SingletonConnec tion();
}
return instance;
}

public void DoStuff()
{
utility = new Utility();

utility.DoStuff ();
}
}

class Utility
{
public Utility()
{
}

public void DoStuff()
{

}
}
}

Thanks for any tips,
Dav

[Marc Gravell]

For the link: you're welcome - there is a lot of good content on that
site on a range of C# topics - definitely recommended reading

For the content: [pings the "thanks" in Jon's direction]

Marc