VB.NET Single object instance only

Question

VB.NET: What is the best way to ensure that a particular object may be instantiated only once during program execution?

Answer 1

You need a Singleton.

There a great article (unfortunately in C#) here: http://www.yoda.arachsys.com/csharp/singleton.html

But you'll be able to translate to VB quite easily.

You want the 2 last implementations.

further explanations here: http://en.wikipedia.org/wiki/Singleton%5Fpattern

Mike

Answer 2

Have a look at these

• Introduction to the Singleton Pattern in VB.NET
• VB.NET OOP Part 3: The Singleton Pattern
• Creational Patterns - Singleton using VB.NET

Answer 3

1. Use a module.
2. Use this code

_

Class MySpecialClass
    Private Sub New()
    End Sub

    Public ReadOnly SingleInstance As New MySpecialClass
End Class

Edit: WTF? Why is the code formatting broken?