/// <summary>
/// Gets attribute <paramref name="propertyName"/> as Int64 (or returns
/// null if does not exists).
/// </summary>
/// <param name="propertyName">Name of the single property.</param>
/// <returns>Property value or null.</returns>
public long?GetAsInt64OrNull(string propertyName)
{
TikPropertyItem item = GetOrCreateItem(propertyName);
if (item.HasValue)
{
return(item.GetAsInt64());
}
else
{
return(null);
}
}
/// <summary>
/// Gets attribute <paramref name="propertyName"/> as Int64 (or returns
/// default value if does not exists).
/// </summary>
/// <param name="propertyName">Name of the single property.</param>
/// <returns>Property value or exception.</returns>
/// <exception cref="InvalidOperationException">If property is not defined.</exception>
public long GetAsInt64(string propertyName)
{
TikPropertyItem item = GetOrCreateItem(propertyName);
return(item.GetAsInt64());
}