public void MyEventHandler(...)
{
  ...
}
public void SomeMethod()
{
  class.Event += new EventHandler(MyEventHandler);
}

public void SomeMethod()
{
  class.Event += new delegate(...)
    {
      ... logica per gestire l'evento ...
    }
}

public void SomeMethod
{
  class.Event += (s, e) => doSomething();
}

Imports Microsoft.VisualBasic
Imports TestModel


Public Class EFModule
    Implements IHttpModule

    Protected contesto As HttpApplication
    Protected modello As TestModelEntities

    Public Sub Init(ByVal context As System.Web.HttpApplication) Implements System.Web.IHttpModule.Init

        AddHandler context.BeginRequest, AddressOf InizializzaContesto
        AddHandler context.EndRequest, AddressOf ChiudiContesto

    End Sub

    Public Sub Dispose() Implements System.Web.IHttpModule.Dispose

    End Sub

    Protected Sub InizializzaContesto(ByVal source As Object, ByVal e As EventArgs)

        modello = New TestModelEntities

        HttpContext.Current.Items.Add(New String("modello"), modello)

    End Sub

    Protected Sub ChiudiContesto(ByVal source As Object, ByVal e As EventArgs)

        modello = HttpContext.Current.Items("modello")

        If Not IsNothing(modello) Then
            modello.Dispose()
        End If

    End Sub

End Class