I need help converting a c# anonymous method to vb.net

Question

provider.OptionsSet += delegate
{
  provider.FinishedLoading();
};

Answer 1

provider.OptionsSet += Function() Do
    provider.FinishedLoading() 
End Function 

This is taken from http://www.developerfusion.com/tools/convert/csharp-to-vb/, so I haven't tested it. It might be more helpful if you were able to provide more context. What is this being used for?

Answer 2

Pete Brown has also has an example with inline sub:

http://10rem.net/blog/2010/04/16/tip-anonymous-event-handlers-in-vbnet

Answer 3

Nice demonstration how converters get this dramatically wrong, they have for a long time. The += operator isn't VB.NET syntax, AddHandler is required to subscribe events. Where the Do comes from is anybody's guess. The lambda can't be a Function, except for the very rare cases where the delegate type returns a value. Three bugs in one line, you don't stand a chance. You need VS2010 to write a Sub lambda. Like this:

Module Module1
    Sub Main()
        Dim obj As New Test
        AddHandler obj.example, Sub(sender As Object, e As EventArgs)
                                    '' etc...
                                End Sub
    End Sub
End Module

Class Test
    Public Event example As EventHandler
End Class

For earlier versions, you'll need a little non-anonymous helper method. Like this:

    AddHandler obj.example, AddressOf helper
...
Sub helper(ByVal sender As Object, ByVal e As EventArgs)
    '' etc..
End Sub

Human 1, machine 0.