public static Range BetweenContacts1(this List <Contacts> sender, ContactName firstContact, ContactName lastContact)
{
var startIndex = sender.FirstOrDefault(contact => contact.FirstName == firstContact.FirstName && contact.LastName == firstContact.LastName).StartIndex;
var endIndex = sender.FirstOrDefault(contact => contact.FirstName == lastContact.FirstName && contact.LastName == lastContact.LastName).EndIndex;
return(startIndex..endIndex);
}
/// <summary>
/// Get Indices for between two contacts.
/// </summary>
/// <param name="sender">List of <seealso cref="Contacts"/></param>
/// <param name="firstContact"><seealso cref="ContactName"/></param>
/// <param name="lastContact"><seealso cref="ContactName"/></param>
/// <returns>Start contact index, last contact index with ^ (hat)</returns>
public static (Index startIndex, Index endIndex) BetweenContacts(this List <Contacts> sender, ContactName firstContact, ContactName lastContact)
{
return
(
sender.FirstOrDefault(contact => contact.FirstName ==
firstContact.FirstName && contact.LastName == firstContact.LastName).StartIndex,
sender.FirstOrDefault(contact => contact.FirstName ==
lastContact.FirstName && contact.LastName == lastContact.LastName).EndIndex
);
}
