Options

Avm1SerializerOptions carries the cross-cutting settings:

var options = new Avm1SerializerOptions
{
    DefaultIgnoreCondition = Avm1IgnoreCondition.Never,
    NumberHandling = Avm1NumberHandling.AllowReadingFromString,
    PropertyNamingPolicy = Avm1NamingPolicy.CamelCase,   // applied to members without [Avm1Property]
};
options.Converters.Add(new CoordConverter());
options.Modifiers.Add(info => { /* reshape the contract: rename, reorder, drop properties */ });

var tree = Avm1Serializer.Serialize(value, options);

Avm1SerializerOptions.Default is the shared reflection instance. A context exposes its own configured Options. TypeInfoResolver selects the metadata source (a context, the reflection resolver, or Avm1TypeInfoResolver.Combine(MyContext.Default, new DefaultAvm1TypeInfoResolver()) to chain them).

Null and default handling

Write behaviour is controlled by DefaultIgnoreCondition:

Numbers

Avm1Number wraps a double. NumberHandling (a [Flags] enum) tunes conversion, mirroring how AVM1 itself coerces:

Naming, modifiers, AOT

• PropertyNamingPolicy (e.g. Avm1NamingPolicy.CamelCase) is applied to members without an explicit [Avm1Property].
• Modifiers lets you reshape the contract at runtime — rename, reorder, or drop properties.
• For AOT / trimming, use a source-generated context (MyContext.Default); reflection mode is not AOT-safe ([RequiresDynamicCode]).