public void Clear()
{
if (_personal != null)
{
_personal.Clear();
}
_personal = null;
if (_other != null)
{
_other.Clear();
}
_other = null;
if (_intermediate != null)
{
_intermediate.Clear();
}
_intermediate = null;
if (_trusted != null)
{
_trusted.Clear();
}
_trusted = null;
if (_untrusted != null)
{
_untrusted.Clear();
}
_untrusted = null;
}
