System.Yaml.Serialization.EasyTypeConverter.RegisterTypeConverterFor C# (CSharp) Méthode

        private static TypeConverter RegisterTypeConverterFor(Type type)
        {
            var converter_attr = type.GetAttribute<TypeConverterAttribute>();
            if ( converter_attr != null ) {
                // What is the difference between these two conditions?
                TypeConverterSpecified[type] = true;
                var converterType = TypeUtils.GetType(converter_attr.ConverterTypeName);
                return TypeConverters[type] = Activator.CreateInstance(converterType) as TypeConverter;
            } else {
                // What is the difference between these two conditions?
                TypeConverterSpecified[type] = false;
                return TypeConverters[type] = TypeDescriptor.GetConverter(type);
            }
        }