/// <summary>
/// Removes the left-over weak references for entries in the dictionary
/// whose key or value has already been reclaimed by the garbage
/// collector. This will reduce the dictionary's Count by the number
/// of dead key-value pairs that were eliminated.
/// </summary>
public void RemoveCollectedEntries()
{
List <object> toRemove = null;
foreach (KeyValuePair <object, LogoFX.Core.WeakReference <TValue> > pair in this.dictionary)
{
var weakKey = (LogoFX.Core.WeakReference <TKey>)(pair.Key);
LogoFX.Core.WeakReference <TValue> weakValue = pair.Value;
if (!weakKey.IsAlive || !weakValue.IsAlive)
{
if (toRemove == null)
{
toRemove = new List <object>();
}
toRemove.Add(weakKey);
}
}
if (toRemove != null)
{
foreach (object key in toRemove)
{
this.dictionary.Remove(key);
}
}
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>
/// A <see cref="T:System.Collections.Generic.IEnumerator`1"/> that can be used to iterate through the collection.
/// </returns>
/// <filterpriority>1</filterpriority>
public override IEnumerator <KeyValuePair <TKey, TValue> > GetEnumerator()
{
foreach (KeyValuePair <object, LogoFX.Core.WeakReference <TValue> > kvp in this.dictionary)
{
var weakKey = (LogoFX.Core.WeakReference <TKey>)(kvp.Key);
LogoFX.Core.WeakReference <TValue> weakValue = kvp.Value;
TKey key = weakKey.Target;
TValue value = weakValue.Target;
if (weakKey.IsAlive && weakValue.IsAlive)
{
yield return(new KeyValuePair <TKey, TValue>(key, value));
}
}
}
