private T GetOrAdd <T>(ILookupKey <T> lookupKey, T value)
{
if (hashtable.ContainsKey(lookupKey))
{
return((T)hashtable[lookupKey]);
}
hashtable[lookupKey] = value;
return(value);
}
private T GetOrAdd <T>(ILookupKey <T> lookupKey, Func <T> factory)
{
if (hashtable.ContainsKey(lookupKey))
{
return((T)hashtable[lookupKey]);
}
T value = default(T);
try {
value = factory();
} catch {
return(value);
}
hashtable[lookupKey] = value;
return(value);
}