/// <summary>
/// Puts state data into the session state with the specified key.
/// </summary>
/// <typeparam name="T">The type of data to put.</typeparam>
/// <param name="key">An object representing the unique key with which the data is stored.</param>
/// <param name="instance">An instance of <typeparamref name="T"/> to store.</param>
public void Put <T>(object key, T instance)
{
_state.Put(key, instance);
}