///<summary>
///Returns an enumerator that iterates through the collection.
///</summary>
///
///<returns>
///A <see cref="T:System.Collections.Generic.IEnumerator`1"></see> that can be used to iterate through the collection.
///</returns>
///<filterpriority>1</filterpriority>
public IEnumerator <KeyValuePair <TKey, TValue> > GetEnumerator()
{
int currentVersion = _version;
for (IEnumerator <KeyValuePair <TKey, TValue> > enumerator = _persistHandler.GetEnumerator(); enumerator.MoveNext();)
{
if (currentVersion != _version)
{
throw new InvalidOperationException("Collection modified during enumeration");
}
yield return(enumerator.Current);
}
}