public override string ToString()
{
var sb = new StringBuilder();
if (Address == null)
sb.Append("no address");
else
{
sb.Append("address: ");
sb.Append(Address);
}
sb.Append(", ");
if (Exception == null)
sb.Append("no exception");
else
{
sb.Append("exception: ");
sb.Append(Exception.Message);
}
return sb.ToString();
}