ConvertTo throwing 'Object reference not set to an instance of an object'

ServiceStack AutoMapping
1

Can anyone help me understand why this piece of code is throwing a NullReferenceException?

    public static ScreenField ToDto(this FieldDefinition @from, IList<ScreenData> screenData)
    {
        if (@from == null)
            return null;

        var to = @from.ConvertTo<ScreenField>();  // <--- exception thrown here
        ...

        return to;
    }

The stack trace simply reads:

   at ServiceStack.AutoMappingUtils.ChangeValueType(Object from, Type toType)

And I get the same result if I change the variable declaration to

var to = new ScreenField().PopulateWith(@from);
2

You’d need to provide the full source-code in order for anyone else to be able to repro the issue.

3

The project’s colossal. This ToDto method is just an extension method. What specifically do you need the source of?

Is it just the Types?

4

I’d need something I can run locally that repros the issue, e.g. an MCVE.