public override String ToString()
{
var sb = new StringBuilder();
sb.Append("\r\n\t\tFrom: "
+ (from != null ? from.ToString() : "")
+ "\r\n\t\tTo: "
+ (to != null ? to.ToString() : ""));
if (errorLimit != null)
{
sb.Append("\r\n\tErrLmt: ").Append(errorLimit);
}
return sb.ToString();
}