ICommand

OperationCommand.cs

public class OperationCommand : ICommand
{

    #region Variables

    private Func<object, bool> CanExecuteHandler { get; set; }
    private Action<object> ExecuteActionHandler { get; set; }

    public bool InSeparateThread { get; set; }
    #endregion

    #region Properties

    #endregion

    #region Construction/Initialization

    public OperationCommand(Action<object> executeAction, bool inSeparateThread = false)
    {
        InSeparateThread = inSeparateThread;
        ExecuteActionHandler = executeAction ?? throw new ArgumentNullException(nameof(executeAction));
    }

    public OperationCommand(Action<object> executeAction, Func<object, bool> canExecute) : this(executeAction)
    {
        CanExecuteHandler = canExecute;
    }

    // Here to adhere to ICommand, change to below if needed
    //public event EventHandler CanExecuteChanged;
    event EventHandler ICommand.CanExecuteChanged
    {
        add {}
        remove {}
    }

    #endregion

    #region Methods

    public bool CanExecute(object parameter) => CanExecuteHandler?.Invoke(parameter) ?? true;

//        public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, new EventArgs());

    public void Execute(object parameter)
    {
        ExecuteActionHandler?.Invoke(parameter);
    }

    #endregion
}
}