'TabsViewModel' does not contain a definition for 'CurrentTab' and no accessible extension method 'CurrentTab' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

'TabsViewModel' does not contain a definition for 'OpenTabs' and no accessible extension method 'OpenTabs' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

'TabsViewModel' does not contain a definition for 'CurrentTab' and no accessible extension method 'CurrentTab' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

There is no argument given that corresponds to the required parameter 'panel' of 'TabsViewModel.CreateNewTab(TabbedApplication, Guid, TabPanelInformation)'

'TabsViewModel' does not contain a definition for 'CurrentTab' and no accessible extension method 'CurrentTab' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

'TabsViewModel' does not contain a definition for 'CurrentTab' and no accessible extension method 'CurrentTab' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

'TabsViewModel' does not contain a definition for 'OpenTabs' and no accessible extension method 'OpenTabs' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

There is no argument given that corresponds to the required parameter 'panel' of 'TabsViewModel.CreateNewTab(TabbedApplication, Guid, TabPanelInformation)'

'TabsViewModel' does not contain a definition for 'CurrentTab' and no accessible extension method 'CurrentTab' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

'TabsViewModel' does not contain a definition for 'OpenTabs' and no accessible extension method 'OpenTabs' accepting a first argument of type 'TabsViewModel' could be found (are you missing a using directive or an assembly reference?)

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. Auto-generated code requires an explicit '#nullable' directive in source.