System.Collections.Concurrent.ConcurrentDictionaryExtensions
namespace System.Collections.Concurrent
{
internal static class ConcurrentDictionaryExtensions
{
public static TValue GetOrAdd<[System.Runtime.CompilerServices.Nullable(2)] TKey, [System.Runtime.CompilerServices.Nullable(2)] TValue, [System.Runtime.CompilerServices.Nullable(2)] TArg>(this ConcurrentDictionary<TKey, TValue> dictionary, TKey key, Func<TKey, TArg, TValue> valueFactory, TArg factoryArgument);
}
}