public void AttachPhoneNumber()
{
// Attach a US phone number to the account 1.
try {
var voximplant = new VoximplantAPI();
var result = voximplant.AttachPhoneNumber(
"US",
"GEOGRAPHIC",
1100L,
countryState: "CA",
phoneCount: 1L
).Result;
Console.WriteLine($"Response: {result.ToString()}");
} catch (Exception e) {
Console.WriteLine($"Error: {e.Message}");
}
}