/// <summary>
/// Create an Invalid Threat List.
/// </summary>
/// <param name="threatListDescriptor">
/// A <see cref="ThreatListDescriptor" /> identifying the threat list.
/// </param>
/// <returns>
/// An invalid threat list.
/// </returns>
/// <exception cref="System.ArgumentNullException">
/// Thrown if <paramref name="threatListDescriptor" /> is a null reference.
/// </exception>
internal static ThreatList CreateInvalidThreatList(ThreatListDescriptor threatListDescriptor)
{
Guard.ThrowIf(nameof(threatListDescriptor), threatListDescriptor).Null();
var threatList = InvalidThreatListCache.Cache.GetOrAdd(threatListDescriptor, tld => {
var cThreatList = new ThreatList(tld, InvalidThreatListCache.InvalidThreatListState, DateTime.UtcNow);
return(cThreatList);
});
return(threatList);
}
/// <summary>
/// Build a Threat List.
/// </summary>
/// <returns>
/// A <see cref="ThreatList" />.
/// </returns>
public ThreatList Build()
{
// ...
//
// Throws an exception if the operation fails.
var threatList = new ThreatList(this);
// ...
//
// Reinitialize the builder's state to prevent it from corrupting the immutable built object's state after
// its built. If the object holds a reference to the builder's state, any mutation to the builder's state
// will be reflected in the built object's state.
this.Descriptor = null;
this.RetrieveDate = default;
this.State = null;
this.WaitToDate = default;
return(threatList);
}