The NullableType property of the SerializedProperty class provides the underlying type of a nullable type. If the property type is a nullable type, this property will return the type that is being wrapped by the nullable type. For example, if the property type is int?, the NullableType will return int.
Use the NullableType property to determine the underlying type of a nullable property. This is particularly useful when you need to perform operations or checks on the base type of a nullable property.
// Example usage of NullableType property
SerializedProperty property = ...; // Assume this is initialized
if (property.IsNullable)
{
System.Type underlyingType = property.NullableType;
Console.WriteLine($"The underlying type of the nullable property is: {underlyingType}");
}