Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, actions/setup-dotnet@v3, actions/create-release@v1, csexton/release-asset-action@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/create-release@v1, csexton/release-asset-action@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Nullability of reference types in type of parameter 'parameter' of 'bool RelayCommand.CanExecute(object parameter)' doesn't match implicitly implemented member 'bool ICommand.CanExecute(object? parameter)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'parameter' of 'void RelayCommand.Execute(object parameter)' doesn't match implicitly implemented member 'void ICommand.Execute(object? parameter)' (possibly because of nullability attributes).

Nullability of reference types in type of 'event EventHandler RelayCommand.CanExecuteChanged' doesn't match implicitly implemented member 'event EventHandler? ICommand.CanExecuteChanged'.

Cannot convert null literal to non-nullable reference type.

Type parameter 'T' has the same name as the type parameter from outer type 'DeserializeXML<T>'

Type parameter 'T' has the same name as the type parameter from outer type 'SerializeXML<T>'

Non-nullable field 'gruppen' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'einstellungen' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'artList' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable field 'removeGroupCommand' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Nullability of reference types in type of parameter 'parameter' of 'bool RelayCommand.CanExecute(object parameter)' doesn't match implicitly implemented member 'bool ICommand.CanExecute(object? parameter)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'parameter' of 'void RelayCommand.Execute(object parameter)' doesn't match implicitly implemented member 'void ICommand.Execute(object? parameter)' (possibly because of nullability attributes).

Nullability of reference types in type of 'event EventHandler RelayCommand.CanExecuteChanged' doesn't match implicitly implemented member 'event EventHandler? ICommand.CanExecuteChanged'.

Type parameter 'T' has the same name as the type parameter from outer type 'DeserializeXML<T>'

Type parameter 'T' has the same name as the type parameter from outer type 'SerializeXML<T>'

Cannot convert null literal to non-nullable reference type.

Non-nullable field '_enumType' must contain a non-null value when exiting constructor. Consider declaring the field as nullable.

Non-nullable property 'tag_name' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Dereference of a possibly null reference.