SelectedTab cannot be set before the pane has been added to a panes collection System.NotSupportedException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Infragistics.Win.UltraWinDock -2146233067 SDL Trados Studio 15.0.0.0 15.2.7.2849 Microsoft Windows 10 Home NULL 2057 1252 LAPTOP-3H2U14O0\podli 4.0.30319.42000 LAPTOP-3H2U14O0 True 16526964 MB