Paste code

using System;
    using System.Windows.Input;
    
    namespace AppSettingInterface.Commands
    {
      public class DelegateCommand : ICommand
      {
        private readonly Predicate<object> _canExecute;
        private readonly Action<object> _execute;
    
        public event EventHandler CanExecuteChanged;
    
        public DelegateCommand( Action<object> execute, Predicate<object> canExecute )
        {
          _execute = execute;
          _canExecute = canExecute;
        }
    
        public DelegateCommand( Action<object> execute ) : this( execute, null ) { }
    
        public virtual bool CanExecute( object parameter )
        {
          if( _canExecute == null )
          {
            return true;
          }
    
          return _canExecute( parameter );
        }
    
        public void Execute( object parameter ) =>_execute( parameter );
    
        public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke( this, EventArgs.Empty );
      }
    }