Hallo Steffen,
wie finde ich denn das entsprechende Bild?
Unter diesem Dateinamen finde ich leider nichts, auch nicht in der Bildersuche 

und wenn ich weiter runter scrolle kommt irgendwann das:

mit folgenden Details:
System.ArgumentException
-----------------
extension cannot be null (Parameter 'extension')
-----------------
at Manina.Windows.Forms.ImageListViewItem.get_FileType()
at Manina.Windows.Forms.ImageListViewItem.GetSubItemText(ColumnType type)
at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyDetailsListRenderer.getSubItemText(ImageListViewItem item, ImageListViewColumnHeader column) in c:\P\ukeim\zp-develop\ZetaProducerExtendedControls\Source\ExtendedControlsLibrary\Specialized\AssetManagementImages\ImageList\MyDetailsListRenderer.cs:line 442
at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyDetailsListRenderer.DrawItem(Graphics g, ImageListViewItem item, ItemState state, Rectangle bounds) in c:\P\ukeim\zp-develop\ZetaProducerExtendedControls\Source\ExtendedControlsLibrary\Specialized\AssetManagementImages\ImageList\MyDetailsListRenderer.cs:line 399
at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyThumbnailsRenderer.DrawItem(Graphics g, ImageListViewItem item, ItemState state, Rectangle bounds) in c:\P\ukeim\zp-develop\ZetaProducerExtendedControls\Source\ExtendedControlsLibrary\Specialized\AssetManagementImages\ImageList\MyThumbnailsRenderer.cs:line 106
at Manina.Windows.Forms.ImageListView.ImageListViewRenderer.RenderItems(Graphics g)
at Manina.Windows.Forms.ImageListView.OnPaint(PaintEventArgs e)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
ArgumentException
{
Message="extension cannot be null (Parameter \\'extension\\')",
ParamName="extension",
TargetSite=RuntimeMethodInfo: get_FileType,
Data=
[
]
,
InnerException=null,
HelpLink=null,
Source="ImageListView",
HResult=-2147024809,
StackTrace=" at Manina.Windows.Forms.ImageListViewItem.get_FileType()\\r\\n at Manina.Windows.Forms.ImageListViewItem.GetSubItemText(ColumnType type)\\r\\n at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyDetailsListRenderer.getSubItemText(ImageListViewItem item, ImageListViewColumnHeader column) in c:\\P\\ukeim\\zp-develop\\ZetaProducerExtendedControls\\Source\\ExtendedControlsLibrary\\Specialized\\AssetManagementImages\\ImageList\\MyDetailsListRenderer.cs:line 442\\r\\n at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyDetailsListRenderer.DrawItem(Graphics g, ImageListViewItem item, ItemState state, Rectangle bounds) in c:\\P\\ukeim\\zp-develop\\ZetaProducerExtendedControls\\Source\\ExtendedControlsLibrary\\Specialized\\AssetManagementImages\\ImageList\\MyDetailsListRenderer.cs:line 399\\r\\n at ZetaProducer.ExtendedControls.Core.Specialized.AssetManagementImages.ImageList.MyThumbnailsRenderer.DrawItem(Graphics g, ImageListViewItem item, ItemState state, Rectangle bounds) in c:\\P\\ukeim\\zp-develop\\ZetaProducerExtendedControls\\Source\\ExtendedControlsLibrary\\Specialized\\AssetManagementImages\\ImageList\\MyThumbnailsRenderer.cs:line 106\\r\\n at Manina.Windows.Forms.ImageListView.ImageListViewRenderer.RenderItems(Graphics g)\\r\\n at Manina.Windows.Forms.ImageListView.OnPaint(PaintEventArgs e)\\r\\n at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)\\r\\n at System.Windows.Forms.Control.WmPaint(Message& m)\\r\\n at System.Windows.Forms.Control.WndProc(Message& m)\\r\\n at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)"
}
Kann das vielleicht alles zusammenhängen?