/// <summary>
/// Try to set the state to newState if state equals oldState. Return succeess//fail
/// </summary>
/// <param name="oldState"></param>
/// <param name="newState"></param>
/// <returns></returns>
private bool CasState(ElementState <T> oldState, ElementState <T> newState)
{
ElementState <T> prevState = Interlocked.CompareExchange <ElementState <T> >(ref state, newState, oldState);
return(oldState == prevState);
}
public Element(T value, uint key)
{
this.value = value;
this.key = key;
state = new ElementState <T>(false, null);
}