[RESOLVED] Weird behaviour of variable scope using BackgroundWorker

[dday9]

I was thinking that maybe the types aren't thread safe, but Sytem.Int32 clearly is:

All members of this type are thread safe. Members that appear to modify instance state actually return a new instance initialized with the new value. As with any other type, reading and writing to a shared variable that contains an instance of this type must be protected by a lock to guarantee thread safety.

Have you tried setting the default instance of KartenHöhe ie-

Private KartenHöhe As Integer = -1
    Public ReadOnly Property KartenHöhe_ As Integer
        Get
            Return Me.KartenHöhe
        End Get
    End Property

Instead of:
[code]

Private KartenHöhe As Integer
    Public ReadOnly Property KartenHöhe_ As Integer
        Get
            Return Me.KartenHöhe
        End Get
    End Property