Disposing ObservableCollection<>

Question

Do we need to dispose each item inside a ObservableCollection while dispoing the container class? Or can we just dispose the container class, it will dispose all objects inside that class. Say for example:

  public class SomeClass : IDisposable
  {

      private ObservableCollection<JobItem> jobItemTemplates = new ObservableCollection<JobItem>(); 
      public ObservableCollection<JobItem> JobItemTemplates
      {
        get 
        {
            return this.jobItemTemplates; 
        }

        set
        {
            if (this.jobItemTemplates != value)
            {
                this.jobItemTemplates = value;
                this.OnPropertyChanged("JobItemTemplates");
            }
        }
    }
 }

  protected override void OnDispose()
  {        
    GC.SuppressFinalize(this);
    if (this.jobTreeItemViewModelItem != null)
    {
        foreach(JobTreeItemViewModel  item in this.jobTreeItemViewModelItem)
        {
             item.Dispose();
        }
        this.jobTreeItemViewModelItem.Clear();
     }

     this.jobTreeItemViewModelItem = null;
    }
 }

Answer 1

ObservableCollection does not implement IDisposable and it doesn't check the type of the items either. So you'll have to dispose of the items by hand (or implement a IDisposable container for the disposables)