private ArrayList GetMatchingKeys(UniqueId contextId)
{
if (contextId == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull(nameof(contextId));
}
ArrayList matchingKeys = new ArrayList(2);
bool lockHeld = false;
try
{
try { }
finally
{
CacheLock.AcquireReaderLock(-1);
lockHeld = true;
}
foreach (object key in Entries.Keys)
{
bool isMatch;
if (key is UniqueId)
{
isMatch = (((UniqueId)key) == contextId);
}
else
{
isMatch = (((ContextAndGenerationKey)key).ContextId == contextId);
}
if (isMatch)
{
matchingKeys.Add(key);
}
}
}
finally
{
if (lockHeld)
{
CacheLock.ReleaseReaderLock();
}
}
return matchingKeys;
}