public void Close()
{
if (_eMail != null)
{
_eMail.Close();
_eMail = null;
}
if (_Writer != null)
{
_Writer.Close();
_Writer = null;
}
lock (_Instances) {
_Instances.Remove(this);
}
if (object.ReferenceEquals(_Current, this))
{
_Current = null;
}
}