int IComparer.Compare(object a, object b)
{
ContactNumber c1 = (ContactNumber)a;
ContactNumber c2 = (ContactNumber)b;
int n = string.Compare(c1.getCode(), c2.getCode());
return(n);
}
/// <summary>
/// Default Alphabetical Sort by Number Value
/// </summary>
int IComparable.CompareTo(object obj)
{
ContactNumber c = (ContactNumber)obj;
return(string.Compare(this.number, c.getNumber()));
}