I have the following situation:

• multiple virtual directories under same application pool in IIS
• copy of same DLL in all those directories (same version number)
• a singleton class in one in this DLL

The question is, is this singleton class created only once for all those Virtual Directory instances or is there for each of there one singleton class.

The code looks something like this:

    [
Transaction(TransactionOption.Supported),
ClassInterface(ClassInterfaceType.AutoDispatch),
Guid("7DE45C4D-19BE-4AA4-A2DA-F4D86E6502A8")
]
public class SomeClass
{
    private static readonly Singleton singleton = new Singleton();