var disposable = new SampleDisposable();

// false
Console.WriteLine(disposable.IsDisposed); 

disposable.Dispose();

// true
Console.WriteLine(disposable.IsDisposed); 

var disposable = new SampleDisposable();

disposable.Disposing += (s, e) =>
{
    Console.WriteLine("Disposing!");
};

disposable.Disposed += (s, e) =>
{
    Console.WriteLine("Disposed!");
};

disposable.Dispose();

public class SampleDisposable : DisposableComponent
{
    private readonly IDisposable _something;

    public SampleDisposable()
    {
        _something = new DummyDisposable();
        
        // If registered to this property, it is destroyed at the same time as the call to Dispose().
        // This is due to DisposableCollection (see below)
        Disposable.Add(_something);
    }

    protected override void OnDisposing()
    {
        // When this object is destroyed (when Dispose() is called), additional processing can be performed.
    }
    
    protected override void OnDisposed()
    {
        // When this object is destroyed (when Dispose() is called), additional processing can be performed.
    }
}

var disposableCollection = new DisposableCollection();

disposableCollection.Add(somethingDisposable1);
disposableCollection.Add(somethingDisposable2);
disposableCollection.Add(somethingDisposable3);

// All at once!
disposableCollection.Dispose();