/// <summary>
/// Gets the value from the cache, or creates it
/// </summary>
/// <param name="p">The method used to create the value</param>
/// <returns>The value or null</returns>
public async Task<T> TryGetValueAsync(string subkey, Func<Task<T>> p)
{
T res;
if ((res = await m_parent.TryGetValue(GetKeyForSubkey(subkey)) as T) == null)
await m_parent.AddItem(GetKeyForSubkey(subkey), res = await p());
return res;
}
/// <summary>
/// Gets the value from the cache, or creates it
/// </summary>
/// <param name="p">The method used to create the value</param>
/// <returns>The value or null</returns>
public async Task<T> TryGetValueAsync(Func<Task<T>> p)
{
T res;
if ((res = await m_parent.TryGetValue(m_key) as T) == null)
await m_parent.AddItem(m_key, res = await p());
return res;
}