/// <summary>
/// Adds a key/value pair to the concurrent dictionary if the key does not already exist.
/// Returns the new value, or the existing value if the key already exists.
/// </summary>
public static TValue GetOrAdd <TArg>(SystemConcurrent.ConcurrentDictionary <TKey, TValue> concurrentDictionary,
TKey key, Func <TKey, TArg, TValue> valueFactory, TArg factoryArgument)
{
Helper.Interleave();
return(concurrentDictionary.GetOrAdd(key, valueFactory, factoryArgument));
}
/// <summary>
/// Adds a key/value pair to the concurrent dictionary if the key does not already exist.
/// Returns the new value, or the existing value if the key already exists.
/// </summary>
public static TValue GetOrAdd(SystemConcurrent.ConcurrentDictionary <TKey, TValue> concurrentDictionary,
TKey key, TValue value)
{
Helper.Interleave();
return(concurrentDictionary.GetOrAdd(key, value));
}