public void Dispose()
{
if (this.previewImage != null)
{
Object.DestroyImmediate(this.previewImage);
this.previewImage = null;
}
if (this.previewBundle != null)
{
this.previewBundle.Unload(true);
this.previewBundle = null;
this.previewAsset = null;
}
this.disposed = true;
}