public override void Dispose()
{
this.sourceRootNode.Unobserve();
this.sourceRootNode = null;
this.canExecuteTargetProperty = null;
this.canExecuteChangedWeakEventHandler.Unsubscribe();
this.canExecuteChangedWeakEventHandler = null;
base.Dispose();
}
protected void WhenCommandChanged()
{
if (this.canExecuteTargetProperty != null)
{
if (this.canExecuteChangedWeakEventHandler != null)
{
this.canExecuteChangedWeakEventHandler.Unsubscribe();
this.canExecuteChangedWeakEventHandler = null;
}
var command = this.GetCommand();
this.canExecuteChangedWeakEventHandler = new CanExecuteChangedWeakEventHandler(command, this.OnCanExecuteChanged);
this.OnCanExecuteChanged(command, EventArgs.Empty);
}
}