GD0102: The type of the exported member is not supported
========================================================

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                                      Value
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**Rule ID**                           GD0102
**Category**                          Usage
**Fix is breaking or non-breaking**   Breaking - If the member type is changed

                                      Non-breaking - If the ``[Export]`` attribute is removed
**Enabled by default**                Yes
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Cause
-----

An unsupported type is specified for a member annotated with the ``[Export]``
attribute when a :ref:`Variant-compatible <doc_c_sharp_variant>` type is expected.

Rule description
----------------

Every exported member must be Variant-compatible so it can be marshalled by
the engine.

.. code-block:: csharp

    class SomeType { }

    // SomeType is not a valid member type because it doesn't derive from GodotObject,
    // so it's not compatible with Variant.
    [Export]
    public SomeType InvalidProperty { get; set; }

    // System.Int32 is a valid type because it's compatible with Variant.
    [Export]
    public int ValidProperty { get; set; }

How to fix violations
---------------------

To fix a violation of this rule, change the member's type to be Variant-compatible
or remove the ``[Export]`` attribute.

When to suppress warnings
-------------------------

Do not suppress a warning from this rule. Members with types that can't be marshalled
will result in runtime errors.