/// <summary>
/// Decrement activity count. When count equals 1, indicator will be inactivated.
/// </summary>
void IActivityManager.Detach()
{
lock (thisObject)
{
if (count == 1)
{
indicator.Inactivate();
}
if (count > 0)
{
Interlocked.Decrement(ref count);
}
}
}